Climate and average weather in Heroica Matamoros
In Heroica Matamoros, the summers are muggy, sweltering, showery, and mostly clear and the winters are mild and partly cloudy.
Over the course of the year, the temperature in Heroica Matamoros typically varies from 13°C to 34°C, and is rarely below 6°C or above 36°C. August is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit Heroica Matamoros for warm-weather activities are from early January to late April and late October to late December.
- Hottest
- Aug
- 34°
- Coldest
- Jan
- 13°
- Wettest
- Sep
- 108 mm
- Driest
- Feb
- 27 mm
- Rain / yr
- 619 mm
- 98 wet days
- Daylight
- 10.4–13.6 h
- shortest–longest
- Elevation
- 16 m
- 25.9°N
- Clearest
- Jun
- 42% cloud
Heroica Matamoros is municipal seat of Matamoros, State of Tamaulipas, Mexico.
- Founded
- 1774
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Heroica Matamoros weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early January to late April.
Temperature through the year
Daily average highs and lows in Heroica Matamoros, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.4 months, from May 17 to September 28, with daily high temperatures above 31°C. The hottest month of the year in Heroica Matamoros is August, with an average high of 34°C and low of 26°C.
The cool season lasts 2.6 months, from December 1 to February 18, with daily high temperatures below 24°C. The coldest month of the year in Heroica Matamoros is January, with an average low of 13°C and high of 21°C.
Days typically run about 8°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 21 | 23 | 26 | 28 | 31 | 33 | 33 | 34 | 32 | 29 | 25 | 22 |
| Avg low (°C) | 13 | 14 | 17 | 20 | 23 | 25 | 26 | 26 | 24 | 21 | 17 | 13 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 21 | 13 |
| Feb | 23 | 14 |
| Mar | 26 | 17 |
| Apr | 28 | 20 |
| May | 31 | 23 |
| Jun | 33 | 25 |
| Jul | 33 | 26 |
| Aug | 34 | 26 |
| Sep | 32 | 24 |
| Oct | 29 | 21 |
| Nov | 25 | 17 |
| Dec | 22 | 13 |
How hot and cold Heroica Matamoros really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, Heroica Matamoros feels like about 41°C (around August 6). About 159 days a year carry some heat stress, and 79 of them tip into dangerous heat (feels-like above 39°C), peaking in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 21 | 23 | 26 | 29 | 34 | 39 | 40 | 41 | 37 | 31 | 25 | 22 |
| Air high (°C) | 21 | 23 | 26 | 28 | 31 | 33 | 33 | 34 | 32 | 29 | 25 | 22 |
| Feels-like low (°C) | 13 | 14 | 17 | 20 | 23 | 25 | 26 | 26 | 24 | 21 | 17 | 13 |
| Air low (°C) | 13 | 14 | 17 | 20 | 23 | 25 | 26 | 26 | 24 | 21 | 17 | 13 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 21 | 21 | 13 | 13 |
| Feb | 23 | 23 | 14 | 14 |
| Mar | 26 | 26 | 17 | 17 |
| Apr | 29 | 28 | 20 | 20 |
| May | 34 | 31 | 23 | 23 |
| Jun | 39 | 33 | 25 | 25 |
| Jul | 40 | 33 | 26 | 26 |
| Aug | 41 | 34 | 26 | 26 |
| Sep | 37 | 32 | 24 | 24 |
| Oct | 31 | 29 | 21 | 21 |
| Nov | 25 | 25 | 17 | 17 |
| Dec | 22 | 22 | 13 | 13 |
Average hourly temperature in Heroica Matamoros
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 34°C, and coldest before dawn in January, near 13°C.
Heroica Matamoros weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 21° / 13° | 32 | 5.7 | 10.6 | 7.1 |
| Feb | 23° / 14° | 27 | 5.3 | 11.1 | 7.5 |
| Mar | 26° / 17° | 38 | 5.7 | 11.8 | 7.4 |
| Apr | 28° / 20° | 47 | 5.9 | 12.6 | 6.5 |
| May | 31° / 23° | 45 | 7 | 13.2 | 5.0 |
| Jun | 33° / 25° | 58 | 10.3 | 13.6 | 3.8 |
| Jul | 33° / 26° | 64 | 8.8 | 13.5 | 3.5 |
| Aug | 34° / 26° | 52 | 10.4 | 12.9 | 3.2 |
| Sep | 32° / 24° | 108 | 15.6 | 12.2 | 3.7 |
| Oct | 29° / 21° | 72 | 9.4 | 11.4 | 5.8 |
| Nov | 25° / 17° | 43 | 7.6 | 10.7 | 7.2 |
| Dec | 22° / 13° | 34 | 5.9 | 10.4 | 7.3 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Heroica Matamoros gets about 619 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 2.5 months, from around Aug 6 to Oct 21, peaking in September at about 57% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 19.
September is the wettest month by volume, with 108 mm over about 16 wet days; February is the driest, with 27 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 19 | 18 | 19 | 19 | 23 | 34 | 29 | 34 | 51 | 31 | 25 | 19 |
| Rain days | 6 | 5 | 6 | 6 | 7 | 10 | 9 | 10 | 16 | 9 | 8 | 6 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 19 | 6 |
| Feb | 18 | 5 |
| Mar | 19 | 6 |
| Apr | 19 | 6 |
| May | 23 | 7 |
| Jun | 34 | 10 |
| Jul | 29 | 9 |
| Aug | 34 | 10 |
| Sep | 51 | 16 |
| Oct | 31 | 9 |
| Nov | 25 | 8 |
| Dec | 19 | 6 |
Monthly rainfall
Over a full year, Heroica Matamoros collects about 619 mm of rain across 98 wet days — roughly 52 mm in an average month.
It doesn’t fall evenly. September is the wettest month with 108 mm, while February is the driest at just 27 mm. The three wettest months alone bring about 39% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 32 | 27 | 38 | 47 | 45 | 58 | 64 | 52 | 108 | 72 | 43 | 34 |
| Rain days | 6 | 5 | 6 | 6 | 7 | 10 | 9 | 10 | 16 | 9 | 8 | 6 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 32 | 6 |
| Feb | 27 | 5 |
| Mar | 38 | 6 |
| Apr | 47 | 6 |
| May | 45 | 7 |
| Jun | 58 | 10 |
| Jul | 64 | 9 |
| Aug | 52 | 10 |
| Sep | 108 | 16 |
| Oct | 72 | 9 |
| Nov | 43 | 8 |
| Dec | 34 | 6 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Heroica Matamoros, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around May 6 and lasts for 3.9 months, ending around August 31. The clearest month is June, when the sky is clear, mostly clear, or partly cloudy 74% of the time on average.
The cloudier part of the year begins around November 7 and lasts for 5.9 months, ending around May 5. The cloudiest month is January, when it is overcast or mostly cloudy 56% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 44 | 47 | 52 | 53 | 65 | 74 | 70 | 67 | 59 | 67 | 57 | 48 |
| Cloudier (%) | 56 | 53 | 48 | 47 | 35 | 26 | 30 | 33 | 41 | 33 | 43 | 52 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 44 | 56 |
| Feb | 47 | 53 |
| Mar | 52 | 48 |
| Apr | 53 | 47 |
| May | 65 | 35 |
| Jun | 74 | 26 |
| Jul | 70 | 30 |
| Aug | 67 | 33 |
| Sep | 59 | 41 |
| Oct | 67 | 33 |
| Nov | 57 | 43 |
| Dec | 48 | 52 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 7, brings about 13 h 36 min of light; the shortest, around January 1, only 10 h 24 min — a swing of roughly 3 h 12 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.6 | 11.1 | 11.8 | 12.6 | 13.2 | 13.6 | 13.5 | 12.9 | 12.2 | 11.4 | 10.7 | 10.4 |
| Sunrise (AM) | 7:23 | 7:12 | 6:45 | 6:12 | 5:48 | 5:42 | 5:51 | 6:07 | 6:20 | 6:34 | 6:54 | 7:14 |
| Sunset (PM) | 5:56 | 6:17 | 6:34 | 6:49 | 7:04 | 7:18 | 7:20 | 7:02 | 6:29 | 5:56 | 5:37 | 5:38 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.6 | 7:23 | 5:56 |
| Feb | 11.1 | 7:12 | 6:17 |
| Mar | 11.8 | 6:45 | 6:34 |
| Apr | 12.6 | 6:12 | 6:49 |
| May | 13.2 | 5:48 | 7:04 |
| Jun | 13.6 | 5:42 | 7:18 |
| Jul | 13.5 | 5:51 | 7:20 |
| Aug | 12.9 | 6:07 | 7:02 |
| Sep | 12.2 | 6:20 | 6:29 |
| Oct | 11.4 | 6:34 | 5:56 |
| Nov | 10.7 | 6:54 | 5:37 |
| Dec | 10.4 | 7:14 | 5:38 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Heroica Matamoros averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 18 days.
The sunnier stretch runs 3.6 months, from around May 14 to Aug 31. The sunniest month is July, with roughly 17 sunny days (bright).
The greyest month is January, down near 9 sunny days — about 45% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 10 | 9 | 11 | 10 | 13 | 16 | 18 | 15 | 12 | 15 | 11 | 10 |
| Sky | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Bright | Bright | Mixed | Mixed | Mixed | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 10 | Mixed |
| Feb | 9 | Mixed |
| Mar | 11 | Mixed |
| Apr | 10 | Mixed |
| May | 13 | Mixed |
| Jun | 16 | Bright |
| Jul | 18 | Bright |
| Aug | 15 | Bright |
| Sep | 12 | Mixed |
| Oct | 15 | Mixed |
| Nov | 11 | Mixed |
| Dec | 10 | Mixed |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Heroica Matamoros, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 6.7 months, from around April 4 to October 25. The muggiest month is June, when the air feels humid, muggy or worse about 100% of the time.
The most comfortable stretch runs from around October 26 to April 3, and January is the most comfortable month — the air is dry or comfortable 67% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 51 | 38 | 24 | 10 | 2 | 0 | 0 | 0 | 0 | 8 | 25 | 46 |
| Comfortable (%) | 17 | 18 | 14 | 9 | 2 | 0 | 0 | 0 | 1 | 8 | 15 | 15 |
| Humid (%) | 19 | 17 | 17 | 15 | 6 | 1 | 0 | 0 | 5 | 15 | 19 | 16 |
| Muggy (%) | 13 | 25 | 35 | 30 | 17 | 4 | 0 | 1 | 9 | 21 | 25 | 20 |
| Oppressive (%) | 1 | 2 | 9 | 35 | 59 | 52 | 49 | 45 | 42 | 35 | 15 | 4 |
| Miserable (%) | 0 | 0 | 0 | 1 | 14 | 44 | 50 | 54 | 41 | 12 | 1 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 51 | 17 | 19 | 13 | 1 | 0 |
| Feb | 38 | 18 | 17 | 25 | 2 | 0 |
| Mar | 24 | 14 | 17 | 35 | 9 | 0 |
| Apr | 10 | 9 | 15 | 30 | 35 | 1 |
| May | 2 | 2 | 6 | 17 | 59 | 14 |
| Jun | 0 | 0 | 1 | 4 | 52 | 44 |
| Jul | 0 | 0 | 0 | 0 | 49 | 50 |
| Aug | 0 | 0 | 0 | 1 | 45 | 54 |
| Sep | 0 | 1 | 5 | 9 | 42 | 41 |
| Oct | 8 | 8 | 15 | 21 | 35 | 12 |
| Nov | 25 | 15 | 19 | 25 | 15 | 1 |
| Dec | 46 | 15 | 16 | 20 | 4 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Heroica Matamoros is typically light breeze, near 18 km/h, and varies moderately with the seasons.
The windier part of the year lasts 5.9 months, from around Feb 3 to Jul 31. The windiest month is May, averaging about 20 km/h (light breeze).
The calmer part of the year runs from around Aug 1 to Feb 2, with September the calmest month at about 14 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 17 | 18 | 19 | 20 | 20 | 19 | 19 | 16 | 14 | 16 | 17 | 17 |
| Feels | light breeze | light breeze | light breeze | breezy | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 17 | light breeze |
| Feb | 18 | light breeze |
| Mar | 19 | light breeze |
| Apr | 20 | breezy |
| May | 20 | light breeze |
| Jun | 19 | light breeze |
| Jul | 19 | light breeze |
| Aug | 16 | light breeze |
| Sep | 14 | light breeze |
| Oct | 16 | light breeze |
| Nov | 17 | light breeze |
| Dec | 17 | light breeze |
Hazard calendar for Heroica Matamoros
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Heroica Matamoros sits in the Atlantic hurricane belt; the season peaks August–October.
Best time to visit Heroica Matamoros
To characterize how pleasant the weather is in Heroica Matamoros throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid April, Heroica Matamoros is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Heroica Matamoros for general outdoor tourist activities is from late October to late April, with a peak score in the last week of February.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 7.1 | 7.5 | 7.4 | 6.5 | 5.0 | 3.8 | 3.5 | 3.2 | 3.7 | 5.7 | 7.2 | 7.3 |
| Rating | good | ideal | good | good | fair | fair | poor | poor | fair | good | good | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 7.1 | good |
| Feb | 7.5 | ideal |
| Mar | 7.4 | good |
| Apr | 6.5 | good |
| May | 5.0 | fair |
| Jun | 3.8 | fair |
| Jul | 3.5 | poor |
| Aug | 3.2 | poor |
| Sep | 3.7 | fair |
| Oct | 5.7 | good |
| Nov | 7.2 | good |
| Dec | 7.3 | good |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Heroica Matamoros for hot-weather activities run from mid February to mid August and again from late September to early December, with a peak score in the last week of April.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Heroica Matamoros, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around August (highs near 34°C), the essentials are light clothes, rain gear and sun protection. In the cold season around January (highs near 21°C), pack a light layer.
In August, Heroica Matamoros sees daytime highs around 34°C and nights near 26°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.
Sea temperature near Heroica Matamoros
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 38 km away) is warmest in September at about 29°C and coldest in February near 19°C.
It's comfortable for a long swim from Mar 18 to Jan 2 — about 9.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 19 | 20 | 22 | 25 | 28 | 28 | 29 | 29 | 27 | 24 | 21 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 19 | Cool |
| Mar | 20 | Cool |
| Apr | 22 | Refreshing |
| May | 25 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 27 | Warm |
| Nov | 24 | Warm |
| Dec | 21 | Refreshing |
UV index (midday) in Heroica Matamoros by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Heroica Matamoros peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 8 | 11 | 9 | 12 | 11 | 11 | 10 | 8 | 6 | 5 |
| Level | Moderate | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Average hourly UV index in Heroica Matamoros
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in June the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 4.5 | 6 | 6.5 | 8 | 8 | 8.5 | 8.5 | 8 | 7.5 | 6.5 | 5.5 | 4.5 |
| UV ≥ 6 (h/day) | 0 | 3 | 4 | 6 | 5 | 6.5 | 6 | 6 | 5 | 3.5 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 4.5 | 0 |
| Feb | 6 | 3 |
| Mar | 6.5 | 4 |
| Apr | 8 | 6 |
| May | 8 | 5 |
| Jun | 8.5 | 6.5 |
| Jul | 8.5 | 6 |
| Aug | 8 | 6 |
| Sep | 7.5 | 5 |
| Oct | 6.5 | 3.5 |
| Nov | 5.5 | 0 |
| Dec | 4.5 | 0 |
Air quality in Heroica Matamoros by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in Heroica Matamoros is worst in July — around 25 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (October, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 9 | 11 | 13 | 19 | 20 | 25 | 18 | 13 | 7 | 7 | 9 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 11 | Good |
| Apr | 13 | Moderate |
| May | 19 | Moderate |
| Jun | 20 | Moderate |
| Jul | 25 | Moderate |
| Aug | 18 | Moderate |
| Sep | 13 | Moderate |
| Oct | 7 | Good |
| Nov | 7 | Good |
| Dec | 9 | Good |
Growing season
Heroica Matamoros is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 99 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 99 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Heroica Matamoros banks about 5,124 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 217 | 246 | 352 | 426 | 527 | 568 | 605 | 609 | 536 | 463 | 332 | 243 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 217 |
| Feb | 246 |
| Mar | 352 |
| Apr | 426 |
| May | 527 |
| Jun | 568 |
| Jul | 605 |
| Aug | 609 |
| Sep | 536 |
| Oct | 463 |
| Nov | 332 |
| Dec | 243 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Heroica Matamoros receives about 4.9 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.9 and 6.8 kWh/m².
The brighter stretch of the year lasts 6.3 months, from around Mar 22 to Sep 28. The brightest month is July, averaging about 6.7 kWh/m² (intense).
The dimmest month is December, down near 3.0 kWh/m² — roughly 56% less than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.1 | 3.8 | 4.7 | 5.7 | 6.3 | 6.6 | 6.7 | 6.3 | 5.2 | 4.4 | 3.3 | 2.9 |
| Level | Moderate | Moderate | Bright | Bright | Intense | Intense | Intense | Intense | Bright | Bright | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 3.1 | Moderate |
| Feb | 3.8 | Moderate |
| Mar | 4.7 | Bright |
| Apr | 5.7 | Bright |
| May | 6.3 | Intense |
| Jun | 6.6 | Intense |
| Jul | 6.7 | Intense |
| Aug | 6.3 | Intense |
| Sep | 5.2 | Bright |
| Oct | 4.4 | Bright |
| Nov | 3.3 | Moderate |
| Dec | 2.9 | Moderate |
Where is Heroica Matamoros?
Heroica Matamoros sits at 25.9°N, 97.5°W, 16 m above sea level, in Mexico. The nearest listed city is Brownsville, 3.0 km away.
Topography around Heroica Matamoros
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heroica Matamoros.
Within 3 km, the terrain around Heroica Matamoros has only modest variations in elevation — a maximum elevation change of 13 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 28 m; within 80 km, only modest variations in elevation — a maximum elevation change of 81 m.
The land around Heroica Matamoros is covered by artificial surfaces (66%) and trees (20%) within 3 km, cropland (32%), grassland (21%) and artificial surfaces (20%) within 16 km, and cropland (38%) and water (34%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Heroica Matamoros (25.8797°, -97.5042°, elevation 16 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).