Prunedale climate — normals and trends
Prunedale (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 442 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 September (16.6 °C on average) and the coldest is January (9.8 °C). Rainfall peaks in January.
Prunedale averages 1 frost days, 1 hot days (≥ 30 °C) and 50 rainy days per year.
Prunedale has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.5 °C (on 9 September 1944) and the coldest -3.8 °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
PrunedaleCalifornia
- coords
- 36.78°, -121.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
17.5°C
Average daily low
9.7°C
Annual rainfall
442mm
Sunshine / day
10.8h
Mean relative humidity
78%
Average peak wind
13.9km/h
Seasonal range
6.8°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
50 d/yr
Annual snowfall
0.1 cm
Average feels-like high
17.1 °C
Average feels-like low
8.3 °C
Average peak gust
30.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
19.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.20 · 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
34.5 °C
9 September 1944
Coldest day
-3.8 °C
22 December 1990
Wettest day
71 mm
11 December 2014
Windiest day
46.1 km/h
14 February 1986
Strongest gust
115.2 km/h
14 February 1986
Hottest feels-like
36.0 °C
2 September 2017
Coldest feels-like
-7.9 °C
22 December 1990
Snowiest day
2.2 cm
18 January 1955
Sunniest day
14.1 h
20 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 | 15.2 °C | +1.2 °C | 7 mm | -78 mm |
| Feb | 15.6 °C | +0.9 °C | 97 mm | +14 mm |
| Mar | 15.2 °C | +0.1 °C | 90 mm | +16 mm |
| Apr | 15.6 °C | -0.5 °C | 16 mm | -20 mm |
| May | 17.4 °C | +0.1 °C | 3 mm | -10 mm |
| Jun | 17.5 °C | -1.7 °C | 0 mm | -2 mm |
| Jul | 18.1 °C | -2.6 °C | 1 mm | +0 mm |
| Aug | 20.4 °C | -0.6 °C | 2 mm | +1 mm |
| Sep | 21.3 °C | -0.1 °C | 4 mm | -1 mm |
| Oct | 19.4 °C | -0.5 °C | 23 mm | +5 mm |
| Nov | 17.3 °C | +0.5 °C | 86 mm | +37 mm |
| Dec | 15.4 °C | +1.1 °C | 45 mm | -30 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 Prunedale?
Prunedale has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 442 mm of precipitation per year.
What is the hottest day ever recorded in Prunedale?
The hottest day measured in Prunedale between 1940 and 2025 was 9 September 1944, reaching 34.5 °C.
What is the coldest day in Prunedale?
The coldest day measured in Prunedale between 1940 and 2025 was 22 December 1990, at -3.8 °C.
Does it snow in Prunedale?
Almost never: Prunedale sees virtually no snow, with about 1 frost days per year.
Has the climate of Prunedale warmed?
Yes: Prunedale warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Prunedale?
The wettest day measured in Prunedale between 1940 and 2025 was 11 December 2014, with 71 mm of rain in 24 hours.
What was the windiest day in Prunedale?
The windiest day measured in Prunedale between 1940 and 2025 was 14 February 1986, with winds reaching 46.1 km/h.
What is the warmest month in Prunedale?
The warmest month in Prunedale is September (16.6 °C on average); the coldest is January (9.8 °C).
How much does it rain in Prunedale?
Prunedale receives on average 442 mm of precipitation per year, spread over about 50 rainy days.
Is it sunny in Prunedale?
Prunedale gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Prunedale?
The heaviest 24-hour snowfall measured in Prunedale between 1940 and 2025 was 18 January 1955, with 2.2 cm.
Are there tropical nights in Prunedale?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Prunedale.
What was the most extreme apparent temperature in Prunedale?
In Prunedale, between 1940 and 2025, the highest apparent temperature reached 36.0 °C on 2 September 2017, and the lowest was -7.9 °C on 22 December 1990.
Compare Prunedale with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Prunedale