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Clayton, CA weather and climate

Contra Costa County, CA · population 10,962 · about 440 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Clayton's own coordinates.

The year at a glance

Sunny days
255
clear or partly cloudy, per year
Precipitation
18 in
per year
Wet days
52
rain or snow per year
Snowfall
0 in
per year
Hot days
52
above 90 °F
Freezing nights
6
at or below 32 °F
Humidity
69%
average relative
Average temperature
62 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 57 °FDaily high, Feb: 62 °FDaily high, Mar: 67 °FDaily high, Apr: 72 °FDaily high, May: 78 °FDaily high, Jun: 85 °FDaily high, Jul: 89 °FDaily high, Aug: 89 °FDaily high, Sep: 86 °FDaily high, Oct: 78 °FDaily high, Nov: 66 °FDaily high, Dec: 58 °FDaily low, Jan: 41 °FDaily low, Feb: 44 °FDaily low, Mar: 47 °FDaily low, Apr: 49 °FDaily low, May: 53 °FDaily low, Jun: 57 °FDaily low, Jul: 59 °FDaily low, Aug: 59 °FDaily low, Sep: 58 °FDaily low, Oct: 53 °FDaily low, Nov: 46 °FDaily low, Dec: 41 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high576267727885898986786658
Daily low414447495357595958534641

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovClayton, Jan: 3.7 inClayton, Feb: 3.8 inClayton, Mar: 2.8 inClayton, Apr: 1.3 inClayton, May: 0.7 inClayton, Jun: 0.1 inClayton, Jul: 0.0 inClayton, Aug: 0.1 inClayton, Sep: 0.1 inClayton, Oct: 0.8 inClayton, Nov: 1.7 inClayton, Dec: 3.3 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Clayton3.73.82.81.30.70.10.00.10.10.81.73.3

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovClayton, Jan: 13 daysClayton, Feb: 13 daysClayton, Mar: 16 daysClayton, Apr: 20 daysClayton, May: 24 daysClayton, Jun: 27 daysClayton, Jul: 30 daysClayton, Aug: 29 daysClayton, Sep: 28 daysClayton, Oct: 25 daysClayton, Nov: 17 daysClayton, Dec: 14 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Clayton131316202427302928251714

Compare Clayton with another city

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About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).