Stockton climate — normals and trends
Stockton (United States) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.0 °C and it receives 499 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 (23.3 °C on average) and the coldest is January (8.3 °C). Rainfall peaks in January.
Stockton averages 7 frost days, 85 hot days (≥ 30 °C) and 53 rainy days per year.
Stockton has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 12 to 2 per year over the period.
The hottest day of the period reached 44.5 °C (on 14 July 1972) and the coldest -6.7 °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
StocktonCalifornia
- coords
- 37.96°, -121.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.0°C
Average daily high
23.0°C
Average daily low
10.2°C
Annual rainfall
499mm
Sunshine / day
10.8h
Mean relative humidity
63%
Average peak wind
13.5km/h
Seasonal range
15.0°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
85 d/yr
Rainy days (≥ 1 mm)
53 d/yr
Annual snowfall
0.2 cm
Average feels-like high
22.2 °C
Average feels-like low
8.5 °C
Average peak gust
29.7 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
19.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.54 · 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
44.5 °C
14 July 1972
Coldest day
-6.7 °C
22 December 1990
Wettest day
96 mm
24 October 2021
Windiest day
44.9 km/h
4 January 2008
Strongest gust
97.2 km/h
4 January 2008
Hottest feels-like
45.5 °C
13 July 1972
Coldest feels-like
-11.4 °C
22 December 1990
Snowiest day
2.4 cm
27 December 1988
Sunniest day
14.1 h
29 June 2016
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 | 15.4 °C | +2.0 °C | 22 mm | -73 mm |
| Feb | 17.3 °C | +1.3 °C | 137 mm | +51 mm |
| Mar | 18.9 °C | +0.4 °C | 75 mm | -3 mm |
| Apr | 23.6 °C | +1.6 °C | 12 mm | -27 mm |
| May | 28.7 °C | +2.6 °C | 1 mm | -16 mm |
| Jun | 30.4 °C | +0.4 °C | 0 mm | -4 mm |
| Jul | 30.6 °C | -1.6 °C | 0 mm | -1 mm |
| Aug | 32.5 °C | +1.0 °C | 0 mm | -1 mm |
| Sep | 30.3 °C | +0.6 °C | 1 mm | -5 mm |
| Oct | 23.5 °C | -1.2 °C | 47 mm | +20 mm |
| Nov | 17.7 °C | -0.2 °C | 118 mm | +57 mm |
| Dec | 12.9 °C | -0.6 °C | 75 mm | -11 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 Stockton?
Stockton has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.0 °C and it receives 499 mm of precipitation per year.
What is the hottest day ever recorded in Stockton?
The hottest day measured in Stockton between 1940 and 2025 was 14 July 1972, reaching 44.5 °C.
What is the coldest day in Stockton?
The coldest day measured in Stockton between 1940 and 2025 was 22 December 1990, at -6.7 °C.
Does it snow in Stockton?
Almost never: Stockton sees virtually no snow, with about 7 frost days per year.
Has the climate of Stockton warmed?
Yes: Stockton warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Stockton?
The wettest day measured in Stockton between 1940 and 2025 was 24 October 2021, with 96 mm of rain in 24 hours.
What was the windiest day in Stockton?
The windiest day measured in Stockton between 1940 and 2025 was 4 January 2008, with winds reaching 44.9 km/h.
What is the warmest month in Stockton?
The warmest month in Stockton is July (23.3 °C on average); the coldest is January (8.3 °C).
How much does it rain in Stockton?
Stockton receives on average 499 mm of precipitation per year, spread over about 53 rainy days.
Is it sunny in Stockton?
Stockton 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 Stockton?
The heaviest 24-hour snowfall measured in Stockton between 1940 and 2025 was 27 December 1988, with 2.4 cm.
Are there tropical nights in Stockton?
Yes: Stockton has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Stockton?
In Stockton, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 13 July 1972, and the lowest was -11.4 °C on 22 December 1990.
Compare Stockton with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Stockton