Dixon climate — normals and trends
Dixon (United States) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.5 °C and it receives 522 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 (23.9 °C on average) and the coldest is January (8.6 °C). Rainfall peaks in January.
Dixon averages 5 frost days, 100 hot days (≥ 30 °C) and 54 rainy days per year.
Dixon has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 8 to 2 per year over the period.
The hottest day of the period reached 48.0 °C (on 5 September 2022) and the coldest -6.5 °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
DixonCalifornia
- coords
- 38.45°, -121.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.5°C
Average daily high
23.5°C
Average daily low
10.5°C
Annual rainfall
522mm
Sunshine / day
10.5h
Mean relative humidity
61%
Average peak wind
14.0km/h
Seasonal range
15.3°C
Frost days (< 0 °C)
5 d/yr
Hot days (≥ 30 °C)
100 d/yr
Rainy days (≥ 1 mm)
54 d/yr
Annual snowfall
0.4 cm
Average feels-like high
22.4 °C
Average feels-like low
8.7 °C
Average peak gust
32.1 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
18.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.59 · 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
48.0 °C
5 September 2022
Coldest day
-6.5 °C
22 December 1990
Wettest day
114 mm
24 October 2021
Windiest day
43.3 km/h
4 January 2008
Strongest gust
102.2 km/h
12 December 1995
Hottest feels-like
48.7 °C
14 July 1972
Coldest feels-like
-11.2 °C
22 December 1990
Snowiest day
5.6 cm
4 January 1974
Sunniest day
14.2 h
4 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 | 16.4 °C | +2.9 °C | 18 mm | -86 mm |
| Feb | 17.3 °C | +1.1 °C | 170 mm | +79 mm |
| Mar | 19.0 °C | +0.4 °C | 57 mm | -20 mm |
| Apr | 25.0 °C | +2.6 °C | 8 mm | -28 mm |
| May | 30.3 °C | +3.5 °C | 2 mm | -15 mm |
| Jun | 31.9 °C | +1.0 °C | 0 mm | -4 mm |
| Jul | 31.8 °C | -1.5 °C | 0 mm | -1 mm |
| Aug | 34.8 °C | +2.2 °C | 0 mm | -1 mm |
| Sep | 31.2 °C | +0.4 °C | 2 mm | -3 mm |
| Oct | 24.6 °C | -0.9 °C | 48 mm | +19 mm |
| Nov | 18.5 °C | +0.3 °C | 99 mm | +35 mm |
| Dec | 13.1 °C | -0.5 °C | 86 mm | -6 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 Dixon?
Dixon has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.5 °C and it receives 522 mm of precipitation per year.
What is the hottest day ever recorded in Dixon?
The hottest day measured in Dixon between 1940 and 2025 was 5 September 2022, reaching 48.0 °C.
What is the coldest day in Dixon?
The coldest day measured in Dixon between 1940 and 2025 was 22 December 1990, at -6.5 °C.
Does it snow in Dixon?
Almost never: Dixon sees virtually no snow, with about 5 frost days per year.
Has the climate of Dixon warmed?
Yes: Dixon warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dixon?
The wettest day measured in Dixon between 1940 and 2025 was 24 October 2021, with 114 mm of rain in 24 hours.
What was the windiest day in Dixon?
The windiest day measured in Dixon between 1940 and 2025 was 4 January 2008, with winds reaching 43.3 km/h.
What is the warmest month in Dixon?
The warmest month in Dixon is July (23.9 °C on average); the coldest is January (8.6 °C).
How much does it rain in Dixon?
Dixon receives on average 522 mm of precipitation per year, spread over about 54 rainy days.
Is it sunny in Dixon?
Dixon 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 Dixon?
The heaviest 24-hour snowfall measured in Dixon between 1940 and 2025 was 4 January 1974, with 5.6 cm.
Are there tropical nights in Dixon?
Yes: Dixon has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Dixon?
In Dixon, between 1940 and 2025, the highest apparent temperature reached 48.7 °C on 14 July 1972, and the lowest was -11.2 °C on 22 December 1990.
Compare Dixon with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dixon