San Francisco (CA) monthly weather averages

  • Average daytime temperature

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

    San Francisco average temperature chart (Celsius) San Francisco average temperature chart (Fahrenheit)
    Average monthly temperatures in San Francisco (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 13.2 15.3 15.8 16.9 17.9 19.2 19.8 20.1 21.4 20.6 16.8 13.5
    °F 55.8 59.6 60.4 62.4 64.1 66.5 67.6 68.2 70.5 69.1 62.2 56.3

    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 Francisco monthly rainfall chart (mm) San Francisco monthly rainfall chart (inches)
    Average monthly rainfall in San Francisco (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 125 91 89 40 7 4 1 2 7 35 90 97
    inches 4.9 3.6 3.5 1.6 0.3 0.1 0.1 0.1 0.3 1.4 3.5 3.8
    Rainy days 10 9 11 6 3 1 1 1 2 4 8 10
  • Average daily sunshine

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

    San Francisco average daily sunshine chart
    Average daily sunshine San Francisco
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 6.4 7.9 9.3 11 11.4 11.4 11.1 10.2 9.9 8.7 6.4 5.7
  • Day / night temperatures

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

    San Francisco average minimum / maximum temperatures (Celsius) San Francisco average minimum / maximum temperatures (Fahrenheit)
    Maximum and minimum daily temperatures in San Francisco (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 6.6 8.3 8.5 9.1 10 11.3 11.9 12.5 13 12 9.7 7.2
    Max °C 13.4 15.5 16 17.1 18.1 19.4 20 20.3 21.6 20.8 17 13.7
    Min °F 43.9 46.9 47.2 48.4 49.9 52.3 53.3 54.5 55.4 53.6 49.4 44.9
    Max °F 50 53.4 54 55.6 57.2 59.5 60.6 61.5 63.1 61.5 55.9 50.7
  • Sea temperature

    The graph below shows the average sea temperature.

    San Francisco average sea temperature chart (Celsius) San Francisco average sea temperature chart (Fahrenheit)
    Average sea temperature around San Francisco in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 12.4 12.2 12.2 11.8 11.8 12.2 13.1 14 14.4 14.2 13.6 12.7
    °F 54.2 54 53.9 53.3 53.2 53.9 55.5 57.2 57.9 57.6 56.4 54.9
  • Wind speed

    The graph below shows the average wind speed.

    San Francisco average winspeed by month (km/h) San Francisco average winspeed by month (mph)
    Average wind speed in San Francisco (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 12 14 17 19 21 21 20 19 17 14 13 13
    mph 8 9 11 12 13 13 13 12 10 9 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 Francisco relative humidity averages
    Average relative humidity in San Francisco
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    79% 77% 73% 70% 70% 69% 70% 72% 70% 71% 76% 79%
San Francisco

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San Francisco weather stats

San Francisco weather statistics
Hottest month: September 21.4°C 70.5°F
Driest month: July 1mm 0ins
Sunniest month: April 11hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 125mm 4.9ins
Warmest sea: September 14.4°C 57.9°F
Map showing location of San Francisco (37.77493, -122.41942)

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