Historical Climate Data for 214 Cities • 1981–2025
°F / °C
California Climate Overview
California has an average annual temperature of
64.8°F
(across all 214 cities) with approximately
427 mm of annual precipitation
and average humidity of 60%.
The warmest city is Delano
with average July highs of 113°F,
while Clovis
is the coldest with average January lows of 22.8°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Aug is typically the warmest month across California with average highs around
98.4°F, while
Jan is the coldest with average lows near
34.2°F.
Feb is the wettest month with approximately
87 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
71.6°F
34.2°F
52.9°F
84
68%
2.2
2.90
Feb
73.4°F
35.4°F
54.5°F
87
70%
2.2
3.80
Mar
76.8°F
37.6°F
57.2°F
68
70%
2.2
5.10
Apr
83.7°F
40.3°F
62.1°F
24
66%
2.3
6.40
May
88°F
45.3°F
66.7°F
12
63%
2.3
7.10
Jun
94.5°F
49.8°F
72.1°F
3
56%
2.3
7.60
Jul
97.5°F
55°F
76.3°F
3
51%
2.2
7.50
Aug
98.4°F
56.1°F
77.4°F
3
50%
2.1
6.90
Sep
97.9°F
53.1°F
75.6°F
6
52%
1.9
5.80
Oct
91.2°F
47.1°F
69.3°F
22
54%
1.9
4.50
Nov
81°F
39.2°F
60.1°F
42
59%
2.1
3.30
Dec
72°F
34.3°F
53.2°F
74
65%
2.2
2.60
📈 California Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 California Long-Term Climate Trends (1981–2025)
This chart shows how California's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 214 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in California
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in California.
Redding is the wettest city in California with approximately 1071 mm of annual precipitation on average. View Redding weather history →
What is the warmest month in California?▼
Aug is the warmest month across California, with state-wide average highs of 98.4°F and average lows of 56.1°F.
How many cities in California have weather data?▼
TownPillar has historical weather data for 214 cities in California, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in California?▼
Jun is the sunniest month across California with an average solar radiation of 7.60 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 214 cities in California at monthly temporal resolution.