Pleasant Hill climate — normals and trends
Pleasant Hill (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 14.7 °C and it receives 448 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 (19.7 °C on average) and the coldest is January (8.6 °C). Rainfall peaks in January.
Pleasant Hill averages 3 frost days, 37 hot days (≥ 30 °C) and 51 rainy days per year.
Pleasant Hill has warmed by +1.4 °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 6 to 0 per year over the period.
The hottest day of the period reached 42.5 °C (on 14 July 1972) and the coldest -5.7 °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
Pleasant HillCalifornia
- coords
- 37.95°, -122.06°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.7°C
Average daily high
21.3°C
Average daily low
9.6°C
Annual rainfall
448mm
Sunshine / day
10.6h
Mean relative humidity
71%
Average peak wind
15.7km/h
Seasonal range
11.1°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
37 d/yr
Rainy days (≥ 1 mm)
51 d/yr
Annual snowfall
0.1 cm
Average feels-like high
20.2 °C
Average feels-like low
7.8 °C
Average peak gust
34.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
42.5 °C
14 July 1972
Coldest day
-5.7 °C
22 December 1990
Wettest day
97 mm
13 October 2009
Windiest day
47.5 km/h
3 December 1983
Strongest gust
113.8 km/h
23 December 1955
Hottest feels-like
44.9 °C
17 July 1988
Coldest feels-like
-9.7 °C
22 December 1990
Snowiest day
1.5 cm
13 March 1975
Sunniest day
14.2 h
2 July 2024
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 15.6 °C | +2.3 °C | 13 mm | -74 mm |
| Feb | 16.6 °C | +1.0 °C | 123 mm | +42 mm |
| Mar | 17.4 °C | -0.1 °C | 63 mm | -7 mm |
| Apr | 21.0 °C | +0.7 °C | 7 mm | -26 mm |
| May | 25.3 °C | +1.9 °C | 2 mm | -13 mm |
| Jun | 25.0 °C | -1.5 °C | 0 mm | -3 mm |
| Jul | 25.0 °C | -3.2 °C | 0 mm | -1 mm |
| Aug | 28.3 °C | +0.3 °C | 0 mm | -1 mm |
| Sep | 27.2 °C | -0.3 °C | 2 mm | -1 mm |
| Oct | 22.6 °C | -1.1 °C | 37 mm | +15 mm |
| Nov | 17.4 °C | -0.2 °C | 71 mm | +18 mm |
| Dec | 12.6 °C | -0.9 °C | 49 mm | -29 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 Pleasant Hill?
Pleasant Hill has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 14.7 °C and it receives 448 mm of precipitation per year.
What is the hottest day ever recorded in Pleasant Hill?
The hottest day measured in Pleasant Hill between 1940 and 2025 was 14 July 1972, reaching 42.5 °C.
What is the coldest day in Pleasant Hill?
The coldest day measured in Pleasant Hill between 1940 and 2025 was 22 December 1990, at -5.7 °C.
Does it snow in Pleasant Hill?
Almost never: Pleasant Hill sees virtually no snow, with about 3 frost days per year.
Has the climate of Pleasant Hill warmed?
Yes: Pleasant Hill warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pleasant Hill?
The wettest day measured in Pleasant Hill between 1940 and 2025 was 13 October 2009, with 97 mm of rain in 24 hours.
What was the windiest day in Pleasant Hill?
The windiest day measured in Pleasant Hill between 1940 and 2025 was 3 December 1983, with winds reaching 47.5 km/h.
What is the warmest month in Pleasant Hill?
The warmest month in Pleasant Hill is July (19.7 °C on average); the coldest is January (8.6 °C).
How much does it rain in Pleasant Hill?
Pleasant Hill receives on average 448 mm of precipitation per year, spread over about 51 rainy days.
Is it sunny in Pleasant Hill?
Pleasant Hill gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
What is the biggest single-day snowfall in Pleasant Hill?
The heaviest 24-hour snowfall measured in Pleasant Hill between 1940 and 2025 was 13 March 1975, with 1.5 cm.
Are there tropical nights in Pleasant Hill?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Pleasant Hill.
What was the most extreme apparent temperature in Pleasant Hill?
In Pleasant Hill, between 1940 and 2025, the highest apparent temperature reached 44.9 °C on 17 July 1988, and the lowest was -9.7 °C on 22 December 1990.
Compare Pleasant Hill with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Pleasant Hill