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Walnut Creek, CA weather and climate

Contra Costa County, CA · population 69,790 · about 210 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Walnut Creek'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
48
above 90 °F
Freezing nights
8
at or below 32 °F
Humidity
71%
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: 58 °FDaily high, Feb: 62 °FDaily high, Mar: 67 °FDaily high, Apr: 72 °FDaily high, May: 78 °FDaily high, Jun: 85 °FDaily high, Jul: 88 °FDaily high, Aug: 88 °FDaily high, Sep: 85 °FDaily high, Oct: 78 °FDaily high, Nov: 66 °FDaily high, Dec: 58 °FDaily low, Jan: 40 °FDaily low, Feb: 43 °FDaily low, Mar: 46 °FDaily low, Apr: 48 °FDaily low, May: 52 °FDaily low, Jun: 56 °FDaily low, Jul: 57 °FDaily low, Aug: 57 °FDaily low, Sep: 56 °FDaily low, Oct: 51 °FDaily low, Nov: 44 °FDaily low, Dec: 40 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high586267727885888885786658
Daily low404346485256575756514440

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovWalnut Creek, Jan: 3.7 inWalnut Creek, Feb: 3.8 inWalnut Creek, Mar: 2.8 inWalnut Creek, Apr: 1.3 inWalnut Creek, May: 0.7 inWalnut Creek, Jun: 0.1 inWalnut Creek, Jul: 0.0 inWalnut Creek, Aug: 0.1 inWalnut Creek, Sep: 0.1 inWalnut Creek, Oct: 0.8 inWalnut Creek, Nov: 1.7 inWalnut Creek, Dec: 3.3 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Walnut Creek3.73.82.81.30.70.10.00.10.10.81.73.3

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovWalnut Creek, Jan: 13 daysWalnut Creek, Feb: 13 daysWalnut Creek, Mar: 16 daysWalnut Creek, Apr: 20 daysWalnut Creek, May: 24 daysWalnut Creek, Jun: 27 daysWalnut Creek, Jul: 30 daysWalnut Creek, Aug: 29 daysWalnut Creek, Sep: 28 daysWalnut Creek, Oct: 25 daysWalnut Creek, Nov: 17 daysWalnut Creek, Dec: 14 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Walnut Creek131316202427302928251714

Compare Walnut Creek with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered California city

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).