Climate and average weather in San Pedro
In San Pedro, the summers are sweltering, fairly dry, and clear and the winters are warm and mostly clear.
Over the course of the year, the temperature in San Pedro typically varies from 9°C to 36°C, and is rarely below 3°C or above 39°C. June is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit San Pedro for warm-weather activities is from late October to mid March.
- Hottest
- Jun
- 36°
- Coldest
- Jan
- 9°
- Wettest
- Sep
- 28 mm
- Driest
- Apr
- 3 mm
- Rain / yr
- 146 mm
- 28 wet days
- Daylight
- 10.4–13.6 h
- shortest–longest
- Elevation
- 1,101 m
- 25.8°N
- Clearest
- May
- 27% cloud
San Pedro is municipal seat of San Pedro, State of Coahuila, Mexico.
- Density
- 3,047/km²
- people per km²
- Founded
- 1870
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
San Pedro 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 October to mid March.
Temperature through the year
Daily average highs and lows in San Pedro, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.8 months, from April 17 to September 10, with daily high temperatures above 33°C. The hottest month of the year in San Pedro is June, with an average high of 36°C and low of 23°C.
The cool season lasts 2.5 months, from November 26 to February 9, with daily high temperatures below 25°C. The coldest month of the year in San Pedro is January, with an average low of 9°C and high of 22°C.
Days typically run about 13°C warmer than nights, with the widest day–night swing (around 15°C) in April.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 26 | 29 | 33 | 36 | 36 | 35 | 35 | 33 | 30 | 26 | 22 |
| Avg low (°C) | 9 | 11 | 14 | 18 | 21 | 23 | 24 | 23 | 21 | 18 | 13 | 9 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 22 | 9 |
| Feb | 26 | 11 |
| Mar | 29 | 14 |
| Apr | 33 | 18 |
| May | 36 | 21 |
| Jun | 36 | 23 |
| Jul | 35 | 24 |
| Aug | 35 | 23 |
| Sep | 33 | 21 |
| Oct | 30 | 18 |
| Nov | 26 | 13 |
| Dec | 22 | 9 |
How hot and cold San Pedro 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, San Pedro feels like about 37°C (around June 3). About 172 days a year carry some heat stress, peaking in June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 22 | 25 | 29 | 33 | 35 | 36 | 35 | 35 | 33 | 30 | 26 | 22 |
| Air high (°C) | 22 | 26 | 29 | 33 | 36 | 36 | 35 | 35 | 33 | 30 | 26 | 22 |
| Feels-like low (°C) | 7 | 11 | 14 | 18 | 21 | 23 | 24 | 23 | 21 | 17 | 13 | 8 |
| Air low (°C) | 9 | 11 | 14 | 18 | 21 | 23 | 24 | 23 | 21 | 18 | 13 | 9 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 22 | 22 | 7 | 9 |
| Feb | 25 | 26 | 11 | 11 |
| Mar | 29 | 29 | 14 | 14 |
| Apr | 33 | 33 | 18 | 18 |
| May | 35 | 36 | 21 | 21 |
| Jun | 36 | 36 | 23 | 23 |
| Jul | 35 | 35 | 24 | 24 |
| Aug | 35 | 35 | 23 | 23 |
| Sep | 33 | 33 | 21 | 21 |
| Oct | 30 | 30 | 17 | 18 |
| Nov | 26 | 26 | 13 | 13 |
| Dec | 22 | 22 | 8 | 9 |
Average hourly temperature in San Pedro
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 June afternoons, near 36°C, and coldest before dawn in January, near 9°C.
San Pedro 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 | 22° / 9° | 9 | 1.5 | 10.6 | 8.4 |
| Feb | 26° / 11° | 5 | 1 | 11.1 | 8.5 |
| Mar | 29° / 14° | 8 | 1.4 | 11.8 | 7.1 |
| Apr | 33° / 18° | 3 | 0.9 | 12.6 | 4.7 |
| May | 36° / 21° | 7 | 1.9 | 13.2 | 2.9 |
| Jun | 36° / 23° | 14 | 3 | 13.6 | 2.4 |
| Jul | 35° / 24° | 24 | 4.4 | 13.4 | 2.9 |
| Aug | 35° / 23° | 18 | 3.3 | 12.9 | 3.2 |
| Sep | 33° / 21° | 28 | 5.1 | 12.2 | 4.3 |
| Oct | 30° / 18° | 15 | 2.2 | 11.4 | 6.2 |
| Nov | 26° / 13° | 9 | 1.6 | 10.7 | 8.6 |
| Dec | 22° / 9° | 7 | 1.5 | 10.4 | 8.4 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
San Pedro gets about 146 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 4.7 months, from around Jun 1 to Oct 22, peaking in September at about 18% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Apr 2.
September is the wettest month by volume, with 28 mm over about 5 wet days; April is the driest, with 3 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 5 | 4 | 4 | 3 | 6 | 10 | 13 | 12 | 16 | 8 | 5 | 5 |
| Rain days | 2 | 1 | 1 | 1 | 2 | 3 | 4 | 3 | 5 | 2 | 2 | 2 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 5 | 2 |
| Feb | 4 | 1 |
| Mar | 4 | 1 |
| Apr | 3 | 1 |
| May | 6 | 2 |
| Jun | 10 | 3 |
| Jul | 13 | 4 |
| Aug | 12 | 3 |
| Sep | 16 | 5 |
| Oct | 8 | 2 |
| Nov | 5 | 2 |
| Dec | 5 | 2 |
Monthly rainfall
Over a full year, San Pedro collects about 146 mm of rain across 28 wet days — roughly 12 mm in an average month.
It doesn’t fall evenly. September is the wettest month with 28 mm, while April is the driest at just 3 mm. The three wettest months alone bring about 47% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 9 | 5 | 8 | 3 | 7 | 14 | 24 | 18 | 28 | 15 | 9 | 7 |
| Rain days | 2 | 1 | 1 | 1 | 2 | 3 | 4 | 3 | 5 | 2 | 2 | 2 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 9 | 2 |
| Feb | 5 | 1 |
| Mar | 8 | 1 |
| Apr | 3 | 1 |
| May | 7 | 2 |
| Jun | 14 | 3 |
| Jul | 24 | 4 |
| Aug | 18 | 3 |
| Sep | 28 | 5 |
| Oct | 15 | 2 |
| Nov | 9 | 2 |
| Dec | 7 | 2 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In San Pedro, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around April 21 and lasts for 2.6 months, ending around July 7. The clearest month is June, when the sky is clear, mostly clear, or partly cloudy 87% of the time on average.
The cloudier part of the year begins around November 27 and lasts for 3.8 months, ending around March 23. The cloudiest month is January, when it is overcast or mostly cloudy 33% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 67 | 70 | 74 | 77 | 87 | 87 | 76 | 79 | 73 | 81 | 79 | 68 |
| Cloudier (%) | 33 | 30 | 26 | 23 | 13 | 13 | 24 | 21 | 27 | 19 | 21 | 32 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 67 | 33 |
| Feb | 70 | 30 |
| Mar | 74 | 26 |
| Apr | 77 | 23 |
| May | 87 | 13 |
| Jun | 87 | 13 |
| Jul | 76 | 24 |
| Aug | 79 | 21 |
| Sep | 73 | 27 |
| Oct | 81 | 19 |
| Nov | 79 | 21 |
| Dec | 68 | 32 |
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 8, 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 | 13.4 | 12.9 | 12.2 | 11.4 | 10.7 | 10.4 |
| Sunrise (AM) | 7:45 | 7:34 | 7:07 | 6:34 | 6:11 | 6:04 | 6:14 | 6:29 | 6:42 | 6:55 | 7:16 | 7:36 |
| Sunset (PM) | 6:18 | 6:40 | 6:56 | 7:10 | 7:26 | 7:40 | 7:41 | 7:23 | 6:51 | 6:18 | 5:59 | 6:00 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.6 | 7:45 | 6:18 |
| Feb | 11.1 | 7:34 | 6:40 |
| Mar | 11.8 | 7:07 | 6:56 |
| Apr | 12.6 | 6:34 | 7:10 |
| May | 13.2 | 6:11 | 7:26 |
| Jun | 13.6 | 6:04 | 7:40 |
| Jul | 13.4 | 6:14 | 7:41 |
| Aug | 12.9 | 6:29 | 7:23 |
| Sep | 12.2 | 6:42 | 6:51 |
| Oct | 11.4 | 6:55 | 6:18 |
| Nov | 10.7 | 7:16 | 5:59 |
| Dec | 10.4 | 7:36 | 6:00 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
San Pedro averages about 19 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 17 and 24 days.
The sunnier stretch runs 2.3 months, from around Apr 24 to Jul 1. The sunniest month is May, with roughly 23 sunny days (bright).
The greyest month is September, down near 18 sunny days — about 23% fewer than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 17 | 16 | 19 | 19 | 23 | 22 | 19 | 19 | 18 | 22 | 21 | 18 |
| Sky | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 17 | Bright |
| Feb | 16 | Bright |
| Mar | 19 | Bright |
| Apr | 19 | Bright |
| May | 23 | Bright |
| Jun | 22 | Bright |
| Jul | 19 | Bright |
| Aug | 19 | Bright |
| Sep | 18 | Bright |
| Oct | 22 | Bright |
| Nov | 21 | Bright |
| Dec | 18 | Bright |
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 San Pedro, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.5 months, from around June 3 to October 17. The muggiest month is September, when the air feels humid, muggy or worse about 41% of the time.
The most comfortable stretch runs from around October 18 to June 2, and February is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 98 | 95 | 78 | 42 | 31 | 23 | 26 | 63 | 90 | 99 |
| Comfortable (%) | 0 | 0 | 2 | 5 | 19 | 36 | 40 | 45 | 33 | 24 | 9 | 1 |
| Humid (%) | 0 | 0 | 0 | 0 | 3 | 18 | 23 | 25 | 33 | 12 | 1 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 4 | 7 | 7 | 8 | 1 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| Jan | 100 | 0 | 0 | 0 |
| Feb | 100 | 0 | 0 | 0 |
| Mar | 98 | 2 | 0 | 0 |
| Apr | 95 | 5 | 0 | 0 |
| May | 78 | 19 | 3 | 0 |
| Jun | 42 | 36 | 18 | 4 |
| Jul | 31 | 40 | 23 | 7 |
| Aug | 23 | 45 | 25 | 7 |
| Sep | 26 | 33 | 33 | 8 |
| Oct | 63 | 24 | 12 | 1 |
| Nov | 90 | 9 | 1 | 0 |
| Dec | 99 | 1 | 0 | 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 San Pedro is typically light breeze, near 12 km/h, and varies moderately with the seasons.
The windier part of the year lasts 6.9 months, from around Mar 17 to Oct 11. The windiest month is June, averaging about 14 km/h (light breeze).
The calmer part of the year runs from around Oct 12 to Mar 16, with December the calmest month at about 9 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 11 | 12 | 13 | 13 | 14 | 14 | 14 | 13 | 12 | 10 | 9 |
| Feels | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 10 | calm |
| Feb | 11 | calm |
| Mar | 12 | calm |
| Apr | 13 | light breeze |
| May | 13 | light breeze |
| Jun | 14 | light breeze |
| Jul | 14 | light breeze |
| Aug | 14 | light breeze |
| Sep | 13 | light breeze |
| Oct | 12 | calm |
| Nov | 10 | calm |
| Dec | 9 | calm |
Best time to visit San Pedro
To characterize how pleasant the weather is in San Pedro throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early March, San Pedro 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 San Pedro for general outdoor tourist activities is from late October to mid March, with a peak score in the last week of November.
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) | 8.4 | 8.5 | 7.1 | 4.7 | 2.9 | 2.4 | 2.9 | 3.2 | 4.3 | 6.2 | 8.5 | 8.5 |
| Rating | ideal | ideal | good | fair | poor | poor | poor | poor | fair | good | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.4 | ideal |
| Feb | 8.5 | ideal |
| Mar | 7.1 | good |
| Apr | 4.7 | fair |
| May | 2.9 | poor |
| Jun | 2.4 | poor |
| Jul | 2.9 | poor |
| Aug | 3.2 | poor |
| Sep | 4.3 | fair |
| Oct | 6.2 | good |
| Nov | 8.5 | ideal |
| Dec | 8.5 | ideal |
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 San Pedro for hot-weather activities run from early February to early May and again from late August to early December, with a peak score in the last week of October.
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 San Pedro, 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 June (highs near 36°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 22°C), pack light clothes.
In June, San Pedro sees daytime highs around 36°C and nights near 23°C. Pack light clothes and sun protection. About 3 days see rain.
UV index (midday) in San Pedro 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 San Pedro peaks around July 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (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) | 6 | 9 | 11 | 12 | 13 | 13 | 13 | 13 | 11 | 9 | 7 | 6 |
| Level | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 9 | Very high |
| Mar | 11 | Extreme |
| Apr | 12 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 9 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Average hourly UV index in San Pedro
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 July the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 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) | 5.5 | 6.5 | 7.5 | 8 | 8.5 | 9 | 9 | 8.5 | 8 | 6.5 | 5.5 | 5 |
| UV ≥ 6 (h/day) | 1.5 | 4 | 5.5 | 6 | 6.5 | 6.5 | 7 | 6.5 | 5.5 | 4 | 2 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 5.5 | 1.5 |
| Feb | 6.5 | 4 |
| Mar | 7.5 | 5.5 |
| Apr | 8 | 6 |
| May | 8.5 | 6.5 |
| Jun | 9 | 6.5 |
| Jul | 9 | 7 |
| Aug | 8.5 | 6.5 |
| Sep | 8 | 5.5 |
| Oct | 6.5 | 4 |
| Nov | 5.5 | 2 |
| Dec | 5 | 0 |
Growing season
San Pedro 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. San Pedro banks about 4,965 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 163 | 234 | 360 | 462 | 571 | 593 | 600 | 591 | 507 | 429 | 276 | 178 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 163 |
| Feb | 234 |
| Mar | 360 |
| Apr | 462 |
| May | 571 |
| Jun | 593 |
| Jul | 600 |
| Aug | 591 |
| Sep | 507 |
| Oct | 429 |
| Nov | 276 |
| Dec | 178 |
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.
San Pedro receives about 6.2 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.1 and 8.0 kWh/m².
The brighter stretch of the year lasts 6.2 months, from around Mar 7 to Sep 11. The brightest month is May, averaging about 7.9 kWh/m² (intense).
The dimmest month is December, down near 4.2 kWh/m² — roughly 47% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.4 | 5.4 | 6.6 | 7.5 | 8.0 | 7.8 | 7.4 | 7.1 | 6.1 | 5.5 | 4.6 | 4.2 |
| Level | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 4.4 | Bright |
| Feb | 5.4 | Bright |
| Mar | 6.6 | Intense |
| Apr | 7.5 | Intense |
| May | 8.0 | Intense |
| Jun | 7.8 | Intense |
| Jul | 7.4 | Intense |
| Aug | 7.1 | Intense |
| Sep | 6.1 | Intense |
| Oct | 5.5 | Bright |
| Nov | 4.6 | Bright |
| Dec | 4.2 | Bright |
Where is San Pedro?
San Pedro sits at 25.8°N, 103.0°W, 1,101 m above sea level, in Mexico. The nearest listed city is Francisco I. Madero, 29 km away.
Topography around San Pedro
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Pedro.
Within 3 km, the terrain around San Pedro has only modest variations in elevation — a maximum elevation change of 12 m around an average of 1,099 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 383 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,276 m.
The land around San Pedro is covered by shrubs (39%) and artificial surfaces (26%) within 3 km, shrubs (42%) and bare terrain (29%) within 16 km, and shrubs (57%) and bare terrain (32%) 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 San Pedro (25.756°, -102.9839°, elevation 1,101 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. 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).