San Pablo climate — normals and trends
San Pablo (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 497 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 July (19.0 °C on average) and the coldest is January (8.6 °C). Rainfall peaks in January.
San Pablo averages 4 frost days, 34 hot days (≥ 30 °C) and 53 rainy days per year.
San Pablo has warmed by +1.3 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 8 to 0 per year over the period.
The hottest day of the period reached 43.5 °C (on 2 September 2017) and the coldest -5.3 °C (on 22 December 1990).
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 PabloCalifornia
- coords
- 37.96°, -122.35°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.4°C
Average daily high
21.0°C
Average daily low
9.3°C
Annual rainfall
497mm
Sunshine / day
10.5h
Mean relative humidity
70%
Average peak wind
15.6km/h
Seasonal range
10.4°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
34 d/yr
Rainy days (≥ 1 mm)
53 d/yr
Annual snowfall
0.1 cm
Average feels-like high
19.9 °C
Average feels-like low
7.4 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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
43.5 °C
2 September 2017
Coldest day
-5.3 °C
22 December 1990
Wettest day
85 mm
4 January 1982
Windiest day
49.3 km/h
3 December 1983
Strongest gust
111.2 km/h
23 December 1955
Hottest feels-like
45.0 °C
17 July 1988
Coldest feels-like
-9.7 °C
22 December 1990
Snowiest day
1.7 cm
4 January 1974
Sunniest day
14.2 h
5 July 2025
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 | 15.8 °C | +2.4 °C | 15 mm | -82 mm |
| Feb | 16.4 °C | +0.8 °C | 132 mm | +40 mm |
| Mar | 17.1 °C | -0.2 °C | 65 mm | -12 mm |
| Apr | 20.3 °C | +0.3 °C | 9 mm | -29 mm |
| May | 24.8 °C | +1.8 °C | 2 mm | -14 mm |
| Jun | 24.3 °C | -1.7 °C | 0 mm | -4 mm |
| Jul | 23.9 °C | -3.5 °C | 0 mm | -1 mm |
| Aug | 27.9 °C | +0.5 °C | 0 mm | -1 mm |
| Sep | 26.6 °C | -0.6 °C | 3 mm | -1 mm |
| Oct | 22.6 °C | -1.1 °C | 38 mm | +13 mm |
| Nov | 17.7 °C | 0.0 °C | 72 mm | +14 mm |
| Dec | 13.0 °C | -0.6 °C | 69 mm | -16 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 Pablo?
San Pablo has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 497 mm of precipitation per year.
What is the hottest day ever recorded in San Pablo?
The hottest day measured in San Pablo between 1940 and 2025 was 2 September 2017, reaching 43.5 °C.
What is the coldest day in San Pablo?
The coldest day measured in San Pablo between 1940 and 2025 was 22 December 1990, at -5.3 °C.
Does it snow in San Pablo?
Almost never: San Pablo sees virtually no snow, with about 4 frost days per year.
Has the climate of San Pablo warmed?
Yes: San Pablo warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Pablo?
The wettest day measured in San Pablo between 1940 and 2025 was 4 January 1982, with 85 mm of rain in 24 hours.
What was the windiest day in San Pablo?
The windiest day measured in San Pablo between 1940 and 2025 was 3 December 1983, with winds reaching 49.3 km/h.
What is the warmest month in San Pablo?
The warmest month in San Pablo is July (19.0 °C on average); the coldest is January (8.6 °C).
How much does it rain in San Pablo?
San Pablo receives on average 497 mm of precipitation per year, spread over about 53 rainy days.
Is it sunny in San Pablo?
San Pablo gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
What is the biggest single-day snowfall in San Pablo?
The heaviest 24-hour snowfall measured in San Pablo between 1940 and 2025 was 4 January 1974, with 1.7 cm.
Are there tropical nights in San Pablo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in San Pablo.
What was the most extreme apparent temperature in San Pablo?
In San Pablo, between 1940 and 2025, the highest apparent temperature reached 45.0 °C on 17 July 1988, and the lowest was -9.7 °C on 22 December 1990.
Compare San Pablo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Pablo