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Sunnyvale, CA weather and climate

Santa Clara County, CA · population 153,455 · about 59 ft elevation

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

The year at a glance

Sunny days
251
clear or partly cloudy, per year
Precipitation
15 in
per year
Wet days
61
rain or snow per year
Snowfall
0 in
per year
Hot days
11
above 90 °F
Freezing nights
2
at or below 32 °F
Humidity
72%
average relative
Average temperature
60 °F
year round

Monthly temperatures

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

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 59 °FDaily high, Feb: 62 °FDaily high, Mar: 65 °FDaily high, Apr: 68 °FDaily high, May: 72 °FDaily high, Jun: 76 °FDaily high, Jul: 78 °FDaily high, Aug: 78 °FDaily high, Sep: 78 °FDaily high, Oct: 74 °FDaily high, Nov: 65 °FDaily high, Dec: 59 °FDaily low, Jan: 42 °FDaily low, Feb: 44 °FDaily low, Mar: 47 °FDaily low, Apr: 49 °FDaily low, May: 53 °FDaily low, Jun: 56 °FDaily low, Jul: 58 °FDaily low, Aug: 59 °FDaily low, Sep: 57 °FDaily low, Oct: 53 °FDaily low, Nov: 46 °FDaily low, Dec: 42 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high596265687276787878746559
Daily low424447495356585957534642

Monthly precipitation

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

0.01.02.03.0JanMarMayJulSepNovSunnyvale, Jan: 2.8 inSunnyvale, Feb: 2.9 inSunnyvale, Mar: 2.3 inSunnyvale, Apr: 1.2 inSunnyvale, May: 0.6 inSunnyvale, Jun: 0.1 inSunnyvale, Jul: 0.0 inSunnyvale, Aug: 0.0 inSunnyvale, Sep: 0.1 inSunnyvale, Oct: 0.7 inSunnyvale, Nov: 1.3 inSunnyvale, Dec: 2.5 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Sunnyvale2.82.92.31.20.60.10.00.00.10.71.32.5

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovSunnyvale, Jan: 14 daysSunnyvale, Feb: 13 daysSunnyvale, Mar: 15 daysSunnyvale, Apr: 18 daysSunnyvale, May: 22 daysSunnyvale, Jun: 25 daysSunnyvale, Jul: 29 daysSunnyvale, Aug: 29 daysSunnyvale, Sep: 28 daysSunnyvale, Oct: 24 daysSunnyvale, Nov: 18 daysSunnyvale, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Sunnyvale141315182225292928241815

Compare Sunnyvale 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).