Thousand Oaks climate — normals and trends
Thousand Oaks (United States) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.4 °C and it receives 404 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 (22.8 °C on average) and the coldest is January (10.7 °C). Rainfall peaks in February.
Thousand Oaks averages 1 frost days, 45 hot days (≥ 30 °C) and 34 rainy days per year.
Thousand Oaks has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 2 to 0 per year over the period.
The hottest day of the period reached 43.3 °C (on 6 September 2020) and the coldest -3.7 °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
Thousand OaksCalifornia
- coords
- 34.17°, -118.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.4°C
Average daily high
22.5°C
Average daily low
11.4°C
Annual rainfall
404mm
Sunshine / day
11.3h
Mean relative humidity
63%
Average peak wind
12.3km/h
Seasonal range
12.1°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
45 d/yr
Rainy days (≥ 1 mm)
34 d/yr
Annual snowfall
1.0 cm
Average feels-like high
21.9 °C
Average feels-like low
10.2 °C
Average peak gust
33.5 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
20.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.40 · 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
43.3 °C
6 September 2020
Coldest day
-3.7 °C
22 December 1990
Wettest day
119 mm
10 January 1995
Windiest day
35.9 km/h
19 January 2021
Strongest gust
92.2 km/h
29 January 1983
Hottest feels-like
43.9 °C
6 September 2020
Coldest feels-like
-8.6 °C
12 January 1963
Snowiest day
10.4 cm
8 February 1989
Sunniest day
14.0 h
31 May 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 | 18.0 °C | +1.3 °C | 19 mm | -64 mm |
| Feb | 18.9 °C | +1.6 °C | 81 mm | -9 mm |
| Mar | 17.2 °C | -1.2 °C | 58 mm | -11 mm |
| Apr | 19.3 °C | -1.3 °C | 12 mm | -16 mm |
| May | 22.5 °C | -0.1 °C | 4 mm | -4 mm |
| Jun | 24.8 °C | -0.7 °C | 1 mm | -0 mm |
| Jul | 25.8 °C | -2.9 °C | 0 mm | -2 mm |
| Aug | 28.7 °C | -0.4 °C | 0 mm | -2 mm |
| Sep | 26.9 °C | -1.2 °C | 18 mm | +12 mm |
| Oct | 23.8 °C | -1.1 °C | 52 mm | +37 mm |
| Nov | 20.3 °C | -0.4 °C | 140 mm | +103 mm |
| Dec | 19.8 °C | +2.6 °C | 156 mm | +95 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 Thousand Oaks?
Thousand Oaks has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.4 °C and it receives 404 mm of precipitation per year.
What is the hottest day ever recorded in Thousand Oaks?
The hottest day measured in Thousand Oaks between 1940 and 2025 was 6 September 2020, reaching 43.3 °C.
What is the coldest day in Thousand Oaks?
The coldest day measured in Thousand Oaks between 1940 and 2025 was 22 December 1990, at -3.7 °C.
Does it snow in Thousand Oaks?
Almost never: Thousand Oaks sees virtually no snow, with about 1 frost days per year.
Has the climate of Thousand Oaks warmed?
Yes: Thousand Oaks warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thousand Oaks?
The wettest day measured in Thousand Oaks between 1940 and 2025 was 10 January 1995, with 119 mm of rain in 24 hours.
What was the windiest day in Thousand Oaks?
The windiest day measured in Thousand Oaks between 1940 and 2025 was 19 January 2021, with winds reaching 35.9 km/h.
What is the warmest month in Thousand Oaks?
The warmest month in Thousand Oaks is August (22.8 °C on average); the coldest is January (10.7 °C).
How much does it rain in Thousand Oaks?
Thousand Oaks receives on average 404 mm of precipitation per year, spread over about 34 rainy days.
Is it sunny in Thousand Oaks?
Thousand Oaks 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 Thousand Oaks?
The heaviest 24-hour snowfall measured in Thousand Oaks between 1940 and 2025 was 8 February 1989, with 10.4 cm.
Are there tropical nights in Thousand Oaks?
Yes: Thousand Oaks has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Thousand Oaks?
In Thousand Oaks, between 1940 and 2025, the highest apparent temperature reached 43.9 °C on 6 September 2020, and the lowest was -8.6 °C on 12 January 1963.
Compare Thousand Oaks with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Thousand Oaks