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Santa Rosa, CA weather and climate

Sonoma County, CA · population 177,216 · about 184 ft elevation

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

The year at a glance

Sunny days
258
clear or partly cloudy, per year
Precipitation
30 in
per year
Wet days
60
rain or snow per year
Snowfall
0 in
per year
Hot days
26
above 90 °F
Freezing nights
15
at or below 32 °F
Humidity
70%
average relative
Average temperature
59 °F
year round

Monthly temperatures

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

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 60 °FDaily high, Feb: 64 °FDaily high, Mar: 67 °FDaily high, Apr: 71 °FDaily high, May: 74 °FDaily high, Jun: 80 °FDaily high, Jul: 82 °FDaily high, Aug: 83 °FDaily high, Sep: 84 °FDaily high, Oct: 79 °FDaily high, Nov: 67 °FDaily high, Dec: 59 °FDaily low, Jan: 38 °FDaily low, Feb: 40 °FDaily low, Mar: 42 °FDaily low, Apr: 44 °FDaily low, May: 48 °FDaily low, Jun: 51 °FDaily low, Jul: 52 °FDaily low, Aug: 53 °FDaily low, Sep: 51 °FDaily low, Oct: 47 °FDaily low, Nov: 42 °FDaily low, Dec: 38 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high606467717480828384796759
Daily low384042444851525351474238

Monthly precipitation

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

0.02.04.06.0JanMarMayJulSepNovSanta Rosa, Jan: 5.7 inSanta Rosa, Feb: 5.9 inSanta Rosa, Mar: 4.4 inSanta Rosa, Apr: 1.9 inSanta Rosa, May: 1.1 inSanta Rosa, Jun: 0.3 inSanta Rosa, Jul: 0.0 inSanta Rosa, Aug: 0.0 inSanta Rosa, Sep: 0.1 inSanta Rosa, Oct: 1.3 inSanta Rosa, Nov: 3.0 inSanta Rosa, Dec: 5.9 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Santa Rosa5.75.94.41.91.10.30.00.00.11.33.05.9

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovSanta Rosa, Jan: 14 daysSanta Rosa, Feb: 13 daysSanta Rosa, Mar: 16 daysSanta Rosa, Apr: 19 daysSanta Rosa, May: 23 daysSanta Rosa, Jun: 27 daysSanta Rosa, Jul: 30 daysSanta Rosa, Aug: 30 daysSanta Rosa, Sep: 28 daysSanta Rosa, Oct: 25 daysSanta Rosa, Nov: 18 daysSanta Rosa, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Santa Rosa141316192327303028251815

Compare Santa Rosa 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).