Climate and average weather in São Mateus
In São Mateus, the weather is muggy, hot, wet, and partly cloudy and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around November.
Over the course of the year, the temperature in São Mateus typically varies from 21°C to 28°C, and is rarely below 19°C or above 29°C. February is the hottest month of the year, while August is the coldest.
Based on the travel score, the best times of year to visit São Mateus for warm-weather activities are from late April to early November and late December to early February.
- Hottest
- Feb
- 28°
- Coldest
- Aug
- 21°
- Wettest
- Nov
- 183 mm
- Driest
- Aug
- 48 mm
- Rain / yr
- 1131 mm
- 169 wet days
- Daylight
- 10.9–13.1 h
- shortest–longest
- Elevation
- 38 m
- 18.7°S
- Clearest
- Jul
- 43% cloud
São Mateus is human settlement in Brazil.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
São Mateus 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 late April to early November.
Temperature through the year
Daily average highs and lows in São Mateus, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in São Mateus stay fairly even through the year, without a distinct hot or cool season. The warmest month is February, with an average high of 28°C and low of 24°C; the coolest is August, with an average low of 21°C and high of 24°C.
Days typically run about 3°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 27 | 26 | 25 | 24 | 24 | 25 | 26 | 26 | 27 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 22 | 21 | 21 | 21 | 22 | 23 | 23 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 28 | 24 |
| Feb | 28 | 24 |
| Mar | 28 | 24 |
| Apr | 27 | 24 |
| May | 26 | 22 |
| Jun | 25 | 21 |
| Jul | 24 | 21 |
| Aug | 24 | 21 |
| Sep | 25 | 22 |
| Oct | 26 | 23 |
| Nov | 26 | 23 |
| Dec | 27 | 24 |
Average hourly temperature in São Mateus
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 February afternoons, near 28°C, and coldest before dawn in August, near 21°C.
São Mateus 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 | 28° / 24° | 106 | 13.4 | 13 | 5.9 |
| Feb | 28° / 24° | 76 | 13.9 | 12.6 | 5.4 |
| Mar | 28° / 24° | 136 | 18.2 | 12.1 | 5.2 |
| Apr | 27° / 24° | 108 | 16.9 | 11.6 | 5.6 |
| May | 26° / 22° | 70 | 13.2 | 11.1 | 6.4 |
| Jun | 25° / 21° | 52 | 11.8 | 10.9 | 6.8 |
| Jul | 24° / 21° | 57 | 13.2 | 11 | 6.8 |
| Aug | 24° / 21° | 48 | 11.2 | 11.4 | 7.1 |
| Sep | 25° / 22° | 54 | 10.8 | 11.9 | 6.9 |
| Oct | 26° / 23° | 96 | 13.4 | 12.4 | 6.2 |
| Nov | 26° / 23° | 183 | 17.6 | 12.9 | 5.3 |
| Dec | 27° / 24° | 147 | 15.5 | 13.1 | 5.5 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
São Mateus gets about 1131 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 1.9 months, from around Oct 24 to Dec 20, peaking in November at about 61% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 2.
November is the wettest month by volume, with 183 mm over about 18 wet days; August is the driest, with 48 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 44 | 50 | 57 | 56 | 43 | 40 | 42 | 37 | 36 | 44 | 58 | 50 |
| Rain days | 13 | 14 | 18 | 17 | 13 | 12 | 13 | 11 | 11 | 13 | 18 | 16 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 44 | 13 |
| Feb | 50 | 14 |
| Mar | 57 | 18 |
| Apr | 56 | 17 |
| May | 43 | 13 |
| Jun | 40 | 12 |
| Jul | 42 | 13 |
| Aug | 37 | 11 |
| Sep | 36 | 11 |
| Oct | 44 | 13 |
| Nov | 58 | 18 |
| Dec | 50 | 16 |
Monthly rainfall
Over a full year, São Mateus collects about 1131 mm of rain across 169 wet days — roughly 94 mm in an average month.
It doesn’t fall evenly. November is the wettest month with 183 mm, while August is the driest at just 48 mm. The three wettest months alone bring about 41% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 106 | 76 | 136 | 108 | 70 | 52 | 57 | 48 | 54 | 96 | 183 | 147 |
| Rain days | 13 | 14 | 18 | 17 | 13 | 12 | 13 | 11 | 11 | 13 | 18 | 16 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 106 | 13 |
| Feb | 76 | 14 |
| Mar | 136 | 18 |
| Apr | 108 | 17 |
| May | 70 | 13 |
| Jun | 52 | 12 |
| Jul | 57 | 13 |
| Aug | 48 | 11 |
| Sep | 54 | 11 |
| Oct | 96 | 13 |
| Nov | 183 | 18 |
| Dec | 147 | 16 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In São Mateus, 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 April 9 and lasts for 5.6 months, ending around September 24. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 76% of the time on average.
The cloudier part of the year begins around September 25 and lasts for 4.5 months, ending around February 7. The cloudiest month is November, when it is overcast or mostly cloudy 63% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 50 | 59 | 55 | 65 | 67 | 74 | 76 | 76 | 68 | 54 | 37 | 39 |
| Cloudier (%) | 50 | 41 | 45 | 35 | 33 | 26 | 24 | 24 | 32 | 46 | 63 | 61 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 50 | 50 |
| Feb | 59 | 41 |
| Mar | 55 | 45 |
| Apr | 65 | 35 |
| May | 67 | 33 |
| Jun | 74 | 26 |
| Jul | 76 | 24 |
| Aug | 76 | 24 |
| Sep | 68 | 32 |
| Oct | 54 | 46 |
| Nov | 37 | 63 |
| Dec | 39 | 61 |
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 January 1, brings about 13 h 06 min of light; the shortest, around June 3, only 10 h 54 min — a swing of roughly 2 h 12 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.0 | 12.6 | 12.1 | 11.6 | 11.1 | 10.9 | 11.0 | 11.4 | 11.9 | 12.4 | 12.9 | 13.1 |
| Sunrise (AM) | 6:18 | 6:35 | 6:45 | 6:52 | 7:02 | 7:13 | 7:16 | 7:03 | 6:37 | 6:11 | 5:58 | 6:02 |
| Sunset (PM) | 7:19 | 7:13 | 6:53 | 6:27 | 6:09 | 6:06 | 6:14 | 6:24 | 6:31 | 6:37 | 6:52 | 7:09 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.0 | 6:18 | 7:19 |
| Feb | 12.6 | 6:35 | 7:13 |
| Mar | 12.1 | 6:45 | 6:53 |
| Apr | 11.6 | 6:52 | 6:27 |
| May | 11.1 | 7:02 | 6:09 |
| Jun | 10.9 | 7:13 | 6:06 |
| Jul | 11.0 | 7:16 | 6:14 |
| Aug | 11.4 | 7:03 | 6:24 |
| Sep | 11.9 | 6:37 | 6:31 |
| Oct | 12.4 | 6:11 | 6:37 |
| Nov | 12.9 | 5:58 | 6:52 |
| Dec | 13.1 | 6:02 | 7:09 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
São Mateus averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 5 and 17 days.
The sunnier stretch runs 5.4 months, from around Apr 13 to Sep 23. The sunniest month is August, with roughly 16 sunny days (bright).
The greyest month is November, down near 7 sunny days — about 57% fewer than the August peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 12 | 12 | 12 | 13 | 14 | 15 | 16 | 16 | 14 | 11 | 7 | 8 |
| Sky | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Bright | Bright | Mixed | Mixed | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 12 | Mixed |
| Feb | 12 | Mixed |
| Mar | 12 | Mixed |
| Apr | 13 | Mixed |
| May | 14 | Mixed |
| Jun | 15 | Bright |
| Jul | 16 | Bright |
| Aug | 16 | Bright |
| Sep | 14 | Mixed |
| Oct | 11 | Mixed |
| Nov | 7 | Gloomy |
| Dec | 8 | Gloomy |
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.
São Mateus is humid all year round — on a typical day the air feels at least humid, and there is no real dry season to wait for.
The stickiest month is January, when it feels muggy, oppressive or miserable about 100% of the time. Even in August, the mildest month, the air is dry or comfortable only 10% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 1 | 3 | 6 | 10 | 6 | 3 | 1 | 0 |
| Humid (%) | 0 | 0 | 0 | 3 | 12 | 19 | 25 | 29 | 20 | 11 | 3 | 0 |
| Muggy (%) | 2 | 1 | 3 | 19 | 46 | 63 | 66 | 57 | 62 | 46 | 25 | 7 |
| Oppressive (%) | 91 | 89 | 85 | 75 | 42 | 15 | 3 | 3 | 12 | 41 | 71 | 90 |
| Miserable (%) | 8 | 10 | 11 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 0 | 0 | 0 | 2 | 91 | 8 |
| Feb | 0 | 0 | 0 | 1 | 89 | 10 |
| Mar | 0 | 0 | 0 | 3 | 85 | 11 |
| Apr | 0 | 0 | 3 | 19 | 75 | 4 |
| May | 0 | 1 | 12 | 46 | 42 | 0 |
| Jun | 0 | 3 | 19 | 63 | 15 | 0 |
| Jul | 0 | 6 | 25 | 66 | 3 | 0 |
| Aug | 1 | 10 | 29 | 57 | 3 | 0 |
| Sep | 0 | 6 | 20 | 62 | 12 | 0 |
| Oct | 0 | 3 | 11 | 46 | 41 | 0 |
| Nov | 0 | 1 | 3 | 25 | 71 | 1 |
| Dec | 0 | 0 | 0 | 7 | 90 | 3 |
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 São Mateus is typically light breeze, near 17 km/h, and varies moderately with the seasons.
The windier part of the year lasts 5.5 months, from around Aug 17 to Jan 31. The windiest month is October, averaging about 20 km/h (light breeze).
The calmer part of the year runs from around Feb 1 to Aug 16, with June 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 | 16 | 15 | 14 | 15 | 14 | 15 | 17 | 19 | 20 | 19 | 18 |
| Feels | light breeze | light breeze | light breeze | light breeze | 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 | 16 | light breeze |
| Mar | 15 | light breeze |
| Apr | 14 | light breeze |
| May | 15 | light breeze |
| Jun | 14 | light breeze |
| Jul | 15 | light breeze |
| Aug | 17 | light breeze |
| Sep | 19 | light breeze |
| Oct | 20 | light breeze |
| Nov | 19 | light breeze |
| Dec | 18 | light breeze |
Best time to visit São Mateus
To characterize how pleasant the weather is in São Mateus throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early May, São Mateus is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
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 times of year to visit São Mateus for general outdoor tourist activities run from late April to early November and again from late December to early February, with a peak score in the last week of August.
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) | 5.9 | 5.4 | 5.2 | 5.6 | 6.4 | 6.8 | 6.8 | 7.1 | 6.9 | 6.2 | 5.3 | 5.5 |
| Rating | good | fair | fair | good | good | good | good | good | good | good | fair | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 5.9 | good |
| Feb | 5.4 | fair |
| Mar | 5.2 | fair |
| Apr | 5.6 | good |
| May | 6.4 | good |
| Jun | 6.8 | good |
| Jul | 6.8 | good |
| Aug | 7.1 | good |
| Sep | 6.9 | good |
| Oct | 6.2 | good |
| Nov | 5.3 | fair |
| Dec | 5.5 | good |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, São Mateus suits hot-weather activities for most of the year, with a peak score in the third week of January.
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 São Mateus, 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.
São Mateus packs about the same all year — highs hold near 28°C. Across the year the things worth having are light clothes, rain gear and sun protection.
In February, São Mateus sees daytime highs around 28°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 14 days see rain.
Sea temperature near São Mateus
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 27 km away) is warmest in March at about 28°C and coldest in August near 24°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 28 | 27 | 26 | 25 | 24 | 24 | 25 | 25 | 26 | 26 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 28 | Warm |
| Apr | 27 | Warm |
| May | 26 | Warm |
| Jun | 25 | Warm |
| Jul | 24 | Warm |
| Aug | 24 | Warm |
| Sep | 25 | Warm |
| Oct | 25 | Warm |
| Nov | 26 | Warm |
| Dec | 26 | Warm |
UV index (midday) in São Mateus 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 São Mateus peaks around February 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).
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) | 14 | 15 | 13 | 10 | 8 | 7 | 7 | 9 | 10 | 12 | 14 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Extreme |
| May | 8 | Very high |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 9 | Very high |
| Sep | 10 | Extreme |
| Oct | 12 | Extreme |
| Nov | 14 | Extreme |
| Dec | 13 | Extreme |
Average hourly UV index in São Mateus
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 February 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) | 8.5 | 8.5 | 8 | 7 | 6 | 6 | 6 | 7 | 7.5 | 8 | 8.5 | 8.5 |
| UV ≥ 6 (h/day) | 7 | 6.5 | 6 | 5 | 3.5 | 2.5 | 3 | 4.5 | 5 | 6 | 6.5 | 6.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 8.5 | 7 |
| Feb | 8.5 | 6.5 |
| Mar | 8 | 6 |
| Apr | 7 | 5 |
| May | 6 | 3.5 |
| Jun | 6 | 2.5 |
| Jul | 6 | 3 |
| Aug | 7 | 4.5 |
| Sep | 7.5 | 5 |
| Oct | 8 | 6 |
| Nov | 8.5 | 6.5 |
| Dec | 8.5 | 6.5 |
Growing season
São Mateus 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 (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 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 | 100 | 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. São Mateus banks about 5,294 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 497 | 455 | 500 | 462 | 439 | 396 | 389 | 388 | 399 | 439 | 445 | 485 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 497 |
| Feb | 455 |
| Mar | 500 |
| Apr | 462 |
| May | 439 |
| Jun | 396 |
| Jul | 389 |
| Aug | 388 |
| Sep | 399 |
| Oct | 439 |
| Nov | 445 |
| Dec | 485 |
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.
São Mateus receives about 5.3 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.8 and 6.7 kWh/m².
The brighter stretch of the year lasts 6.6 months, from around Sep 14 to Apr 2. The brightest month is January, averaging about 6.7 kWh/m² (intense).
The dimmest month is June, down near 3.9 kWh/m² — roughly 43% less than the January peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.8 | 6.7 | 5.9 | 5.0 | 4.2 | 3.8 | 4.0 | 4.7 | 5.4 | 5.8 | 5.8 | 6.3 |
| Level | Intense | Intense | Bright | Bright | Bright | Moderate | Moderate | Bright | Bright | Bright | Bright | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 6.8 | Intense |
| Feb | 6.7 | Intense |
| Mar | 5.9 | Bright |
| Apr | 5.0 | Bright |
| May | 4.2 | Bright |
| Jun | 3.8 | Moderate |
| Jul | 4.0 | Moderate |
| Aug | 4.7 | Bright |
| Sep | 5.4 | Bright |
| Oct | 5.8 | Bright |
| Nov | 5.8 | Bright |
| Dec | 6.3 | Intense |
Where is São Mateus?
São Mateus sits at 18.7°S, 39.9°W, 38 m above sea level, in Brazil. The nearest listed city is Conceição da Barra, 19 km away.
Topography around São Mateus
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Mateus.
Within 3 km, the terrain around São Mateus has only modest variations in elevation — a maximum elevation change of 51 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, large variations in elevation — a maximum elevation change of 744 m.
The land around São Mateus is covered by trees (34%), artificial surfaces (26%) and grassland (21%) within 3 km, trees (55%) and grassland (26%) within 16 km, and grassland (37%), trees (33%) and water (27%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- 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 São Mateus (-18.7201°, -39.8589°, elevation 38 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).