Sonoma (CA) monthly weather averages

  • Average daytime temperature

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

    Sonoma average temperature chart
    Average monthly temperatures in Sonoma (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 13.1 15.9 17 19.2 21.9 24.9 26.7 26.7 26 23.2 17.1 13.1
    °F 55.5 60.6 62.5 66.5 71.4 76.9 80.1 80 78.9 73.8 62.8 55.6

    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.

    Average monthly rainfall in Sonoma (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 172 125 101 49 13 5 1 3 9 44 107 139
    inches 6.8 4.9 4 1.9 0.5 0.2 0.1 0.1 0.4 1.7 4.2 5.5
    Rainy days 10 9 11 6 3 1 1 1 2 4 9 10
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Sonoma

    Average daily sunshine Sonoma
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 6.1 7.8 9.3 11.2 12 12.2 12.1 11.1 10.5 9 6.5 5.6
  • Day / night temperatures

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

    Maximum and minimum daily temperatures in Sonoma (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 3.1 4.9 5.4 6.1 8.2 10.3 11.1 11.4 10.8 8.6 5.6 3.5
    Max °C 13.3 16.2 17.3 19.5 22.3 25.3 27.1 27.1 26.4 23.6 17.4 13.4
    Min °F 37.6 40.7 41.6 43 46.7 50.5 52 52.4 51.4 47.5 42.1 38.2
    Max °F 46.8 50.9 52.3 55 59.4 64 66.4 66.6 65.5 61 52.7 47.1
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Sonoma in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 12.1 12 11.9 11.7 11.8 12.2 13.1 14 14.4 14 13.4 12.6
    °F 53.8 53.6 53.5 53.1 53.2 54 55.5 57.2 57.9 57.3 56.1 54.6
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Sonoma (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 12 14 16 17 19 19 18 17 15 13 12 12
    mph 7 9 10 11 12 12 11 11 9 8 7 7

    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.

    Average relative humidity in Sonoma
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    80% 77% 73% 69% 67% 65% 65% 67% 66% 69% 76% 81%
Sonoma

Other monthly averages

Sonoma weather stats

Sonoma weather statistics
Hottest month: August 26.7°C 80.1°F
Driest month: July 1mm 0ins
Sunniest month: April 11.2hrs
Coldest month: January 13.1°C 55.6°F
Wettest month: January 172mm 6.8ins
Warmest sea: September 14.4°C 57.9°F
Map showing location of Sonoma (38.29186, -122.45804)

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