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San Ramon, CA weather and climate

Contra Costa County, CA · population 85,734 · about 650 ft elevation

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

The year at a glance

Sunny days
257
clear or partly cloudy, per year
Precipitation
18 in
per year
Wet days
53
rain or snow per year
Snowfall
0 in
per year
Hot days
45
above 90 °F
Freezing nights
17
at or below 32 °F
Humidity
69%
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: 56 °FDaily high, Feb: 59 °FDaily high, Mar: 63 °FDaily high, Apr: 67 °FDaily high, May: 73 °FDaily high, Jun: 81 °FDaily high, Jul: 86 °FDaily high, Aug: 86 °FDaily high, Sep: 84 °FDaily high, Oct: 76 °FDaily high, Nov: 64 °FDaily high, Dec: 56 °FDaily low, Jan: 39 °FDaily low, Feb: 41 °FDaily low, Mar: 42 °FDaily low, Apr: 45 °FDaily low, May: 49 °FDaily low, Jun: 54 °FDaily low, Jul: 58 °FDaily low, Aug: 58 °FDaily low, Sep: 56 °FDaily low, Oct: 51 °FDaily low, Nov: 44 °FDaily low, Dec: 39 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high565963677381868684766456
Daily low394142454954585856514439

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovSan Ramon, Jan: 3.5 inSan Ramon, Feb: 3.7 inSan Ramon, Mar: 2.8 inSan Ramon, Apr: 1.3 inSan Ramon, May: 0.7 inSan Ramon, Jun: 0.1 inSan Ramon, Jul: 0.0 inSan Ramon, Aug: 0.1 inSan Ramon, Sep: 0.1 inSan Ramon, Oct: 0.8 inSan Ramon, Nov: 1.6 inSan Ramon, Dec: 3.2 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Ramon3.53.72.81.30.70.10.00.10.10.81.63.2

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovSan Ramon, Jan: 14 daysSan Ramon, Feb: 13 daysSan Ramon, Mar: 16 daysSan Ramon, Apr: 20 daysSan Ramon, May: 23 daysSan Ramon, Jun: 26 daysSan Ramon, Jul: 29 daysSan Ramon, Aug: 29 daysSan Ramon, Sep: 28 daysSan Ramon, Oct: 25 daysSan Ramon, Nov: 18 daysSan Ramon, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Ramon141316202326292928251816

Compare San Ramon 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).