San Pedro climate — normals and trends
San Pedro (Mexico) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 22.3 °C and it receives 199 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is June (28.5 °C on average) and the coldest is January (14.2 °C). Rainfall peaks in September.
San Pedro averages 1 frost days, 181 hot days (≥ 30 °C) and 35 rainy days per year.
San Pedro has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 2 to 0 per year over the period.
The hottest day of the period reached 42.7 °C (on 19 June 2023) and the coldest -8.9 °C (on 11 January 1962).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
San PedroCoahuila
- coords
- 25.43°, -103.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
22.3°C
Average daily high
28.8°C
Average daily low
16.0°C
Annual rainfall
199mm
Sunshine / day
11.2h
Mean relative humidity
42%
Average peak wind
16.4km/h
Seasonal range
14.3°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
181 d/yr
Rainy days (≥ 1 mm)
35 d/yr
Annual snowfall
0.3 cm
Average feels-like high
27.6 °C
Average feels-like low
14.8 °C
Average peak gust
31.9 km/h
Tropical nights (≥ 20 °C)
126 d/yr
Solar radiation
22.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.57 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
42.7 °C
19 June 2023
Coldest day
-8.9 °C
11 January 1962
Wettest day
85 mm
11 September 1983
Windiest day
47.5 km/h
27 March 1999
Strongest gust
85.7 km/h
27 March 1999
Hottest feels-like
43.1 °C
22 June 2023
Coldest feels-like
-13.8 °C
11 January 1962
Snowiest day
10.7 cm
1 January 1947
Sunniest day
13.6 h
9 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 21.4 °C | +0.4 °C | 1 mm | -9 mm |
| Feb | 28.8 °C | +4.7 °C | 0 mm | -6 mm |
| Mar | 31.1 °C | +3.3 °C | 1 mm | -5 mm |
| Apr | 33.7 °C | +2.2 °C | 1 mm | -4 mm |
| May | 35.5 °C | +1.5 °C | 25 mm | +13 mm |
| Jun | 35.7 °C | +1.0 °C | 16 mm | -6 mm |
| Jul | 33.7 °C | +0.2 °C | 49 mm | +15 mm |
| Aug | 34.6 °C | +1.5 °C | 23 mm | -9 mm |
| Sep | 32.5 °C | +1.7 °C | 39 mm | -3 mm |
| Oct | 31.7 °C | +3.2 °C | 0 mm | -17 mm |
| Nov | 28.4 °C | +3.6 °C | 0 mm | -7 mm |
| Dec | 25.1 °C | +3.4 °C | 3 mm | -5 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of San Pedro?
San Pedro has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 22.3 °C and it receives 199 mm of precipitation per year.
What is the hottest day ever recorded in San Pedro?
The hottest day measured in San Pedro between 1940 and 2025 was 19 June 2023, reaching 42.7 °C.
What is the coldest day in San Pedro?
The coldest day measured in San Pedro between 1940 and 2025 was 11 January 1962, at -8.9 °C.
Does it snow in San Pedro?
Almost never: San Pedro sees virtually no snow, with about 1 frost days per year.
Has the climate of San Pedro warmed?
Yes: San Pedro warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Pedro?
The wettest day measured in San Pedro between 1940 and 2025 was 11 September 1983, with 85 mm of rain in 24 hours.
What was the windiest day in San Pedro?
The windiest day measured in San Pedro between 1940 and 2025 was 27 March 1999, with winds reaching 47.5 km/h.
What is the warmest month in San Pedro?
The warmest month in San Pedro is June (28.5 °C on average); the coldest is January (14.2 °C).
How much does it rain in San Pedro?
San Pedro receives on average 199 mm of precipitation per year, spread over about 35 rainy days.
Is it sunny in San Pedro?
San Pedro gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
What is the biggest single-day snowfall in San Pedro?
The heaviest 24-hour snowfall measured in San Pedro between 1940 and 2025 was 1 January 1947, with 10.7 cm.
Are there tropical nights in San Pedro?
Yes: San Pedro has on average 126 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in San Pedro?
In San Pedro, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 22 June 2023, and the lowest was -13.8 °C on 11 January 1962.
Compare San Pedro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Pedro