West Carson climate — normals and trends
West Carson (United States) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 16.8 °C and it receives 302 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 August (21.1 °C on average) and the coldest is January (12.9 °C). Rainfall peaks in February.
West Carson averages 0 frost days, 5 hot days (≥ 30 °C) and 30 rainy days per year.
West Carson has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.8 °C (on 24 October 2017) and the coldest 0.7 °C (on 4 January 1949).
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
West CarsonCalifornia
- coords
- 33.82°, -118.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.8°C
Average daily high
20.7°C
Average daily low
13.8°C
Annual rainfall
302mm
Sunshine / day
11.3h
Mean relative humidity
72%
Average peak wind
17.7km/h
Seasonal range
8.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
30 d/yr
Annual snowfall
0.0 cm
Average feels-like high
20.4 °C
Average feels-like low
13.1 °C
Average peak gust
29.8 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
20.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.31 · 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
36.8 °C
24 October 2017
Coldest day
0.7 °C
4 January 1949
Wettest day
89 mm
10 January 1995
Windiest day
51.8 km/h
30 November 1982
Strongest gust
84.2 km/h
1 March 1983
Hottest feels-like
37.9 °C
4 September 2022
Coldest feels-like
-4.6 °C
4 January 1949
Snowiest day
0.1 cm
11 January 1949
Sunniest day
14.0 h
5 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 | 17.9 °C | +1.0 °C | 16 mm | -48 mm |
| Feb | 17.9 °C | +0.7 °C | 46 mm | -21 mm |
| Mar | 17.1 °C | -0.6 °C | 44 mm | -6 mm |
| Apr | 18.4 °C | -0.7 °C | 6 mm | -14 mm |
| May | 20.8 °C | +0.6 °C | 3 mm | -3 mm |
| Jun | 21.9 °C | -0.1 °C | 2 mm | +1 mm |
| Jul | 22.7 °C | -1.8 °C | 0 mm | -1 mm |
| Aug | 25.5 °C | +0.2 °C | 0 mm | -2 mm |
| Sep | 25.3 °C | +0.4 °C | 8 mm | +3 mm |
| Oct | 22.7 °C | -0.3 °C | 28 mm | +19 mm |
| Nov | 20.0 °C | -0.1 °C | 108 mm | +79 mm |
| Dec | 19.2 °C | +1.8 °C | 71 mm | +24 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 West Carson?
West Carson has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 16.8 °C and it receives 302 mm of precipitation per year.
What is the hottest day ever recorded in West Carson?
The hottest day measured in West Carson between 1940 and 2025 was 24 October 2017, reaching 36.8 °C.
What is the coldest day in West Carson?
The coldest day measured in West Carson between 1940 and 2025 was 4 January 1949, at 0.7 °C.
Does it snow in West Carson?
Almost never: West Carson sees virtually no snow, with about 0 frost days per year.
Has the climate of West Carson warmed?
Yes: West Carson warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in West Carson?
The wettest day measured in West Carson between 1940 and 2025 was 10 January 1995, with 89 mm of rain in 24 hours.
What was the windiest day in West Carson?
The windiest day measured in West Carson between 1940 and 2025 was 30 November 1982, with winds reaching 51.8 km/h.
What is the warmest month in West Carson?
The warmest month in West Carson is August (21.1 °C on average); the coldest is January (12.9 °C).
How much does it rain in West Carson?
West Carson receives on average 302 mm of precipitation per year, spread over about 30 rainy days.
Is it sunny in West Carson?
West Carson gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
What is the biggest single-day snowfall in West Carson?
The heaviest 24-hour snowfall measured in West Carson between 1940 and 2025 was 11 January 1949, with 0.1 cm.
Are there tropical nights in West Carson?
Yes: West Carson has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in West Carson?
In West Carson, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 4 September 2022, and the lowest was -4.6 °C on 4 January 1949.
Compare West Carson with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around West Carson