San Ramon (CA) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at San Ramon

San Ramon average temperature chart (Celsius) San Ramon average temperature chart (Fahrenheit)
Average monthly temperatures in San Ramon (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.9 15.4 16.7 19.3 22.6 26 28.5 28.3 27.1 23.6 17.2 12.9
°F 55.2 59.7 62 66.7 72.6 78.8 83.2 82.9 80.8 74.5 63 55.3

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

San Ramon monthly rainfall chart (mm) San Ramon monthly rainfall chart (inches)
Average monthly rainfall in San Ramon (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 96 74 68 36 10 4 2 2 7 27 66 76
inches 3.8 2.9 2.7 1.4 0.4 0.1 0.1 0.1 0.3 1.1 2.6 3
Rainy days 10 9 10 6 2 1 1 1 2 4 8 9

Average annual rainfall in San Ramon: 381.633mm (150.2 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in San Ramon

San Ramon average daily sunshine chart
Average daily sunshine San Ramon
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.1 7.9 9.5 11.3 12.2 12.5 12.4 11.4 10.7 9.3 6.7 5.5

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

San Ramon average minimum / maximum temperatures (Celsius) San Ramon average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Ramon (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.1 5 5.9 6.8 9.1 11.3 12.4 12.6 11.9 9.5 6.1 3.5
Max °C 13.1 15.7 17 19.6 22.9 26.4 28.9 28.7 27.5 24 17.5 13.2
Min °F 37.6 40.9 42.5 44.2 48.4 52.3 54.2 54.6 53.4 49 43 38.2
Max °F 46.6 50.5 52.5 55.8 60.8 65.8 69.1 69.1 67.5 62.1 53.2 46.9

Sea temperature

The graph below shows the average sea temperature.

San Ramon average sea temperature chart (Celsius) San Ramon average sea temperature chart (Fahrenheit)
Average sea temperature around San Ramon in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.4 12.3 12.2 12 12.1 12.7 13.7 14.6 14.9 14.6 13.8 12.9
°F 54.4 54.1 54 53.6 53.8 54.8 56.7 58.3 58.9 58.3 56.9 55.2

Wind speed

The graph below shows the average wind speed.

San Ramon average winspeed by month (km/h) San Ramon average winspeed by month (mph)
Average wind speed in San Ramon (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 14 16 18 19 19 18 17 15 13 12 12
mph 8 9 10 11 12 12 11 11 9 8 8 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

San Ramon relative humidity averages
Average relative humidity in San Ramon
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
80% 77% 72% 67% 64% 62% 62% 64% 64% 67% 76% 81%

Other monthly averages

UV index Best time to go?

San Ramon weather stats

San Ramon weather statistics
Hottest month: July 28.5°C 83.3°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.3hrs
Coldest month: January 12.9°C 55.2°F
Wettest month: January 96mm 3.8ins
Warmest sea: September 14.9°C 58.8°F
Map showing location of San Ramon (37.77993, -121.97802) San Ramon map pin © Google

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