Petaluma (CA) monthly weather averages

Contents

Average daytime temperature

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

Petaluma average temperature chart (Celsius) Petaluma average temperature chart (Fahrenheit)
Average monthly temperatures in Petaluma (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 13.2 15.9 16.7 18.9 21.5 24.4 26.5 26.5 26.1 23.1 17.2 13.2
°F 55.8 60.6 62 66 70.7 76 79.7 79.6 78.9 73.6 62.9 55.8

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.

Petaluma monthly rainfall chart (mm) Petaluma monthly rainfall chart (inches)
Average monthly rainfall in Petaluma (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 181 131 107 50 12 6 2 3 9 46 116 145
inches 7.1 5.2 4.2 2 0.5 0.2 0.1 0.1 0.4 1.8 4.5 5.7
Rainy days 11 10 11 7 3 2 1 1 2 4 9 10

Average annual rainfall in Petaluma: 722.467mm (284.4 inches)

Average daily sunshine

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

Petaluma average daily sunshine chart
Average daily sunshine Petaluma
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.2 7.8 9.2 11.1 11.8 11.9 11.8 10.8 10.2 8.9 6.4 5.6

Day / night temperatures

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

Petaluma average minimum / maximum temperatures (Celsius) Petaluma average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Petaluma (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3 4.7 5.1 5.8 7.8 9.6 10.3 10.6 10.4 8.1 5.4 3.4
Max °C 13.5 16.2 17 19.2 21.9 24.8 26.9 26.9 26.5 23.5 17.5 13.5
Min °F 37.3 40.4 41.1 42.4 46 49.3 50.5 51 50.6 46.6 41.6 38
Max °F 46.8 50.7 51.8 54.5 58.6 63 65.5 65.7 65.1 60.4 52.5 47.1

Sea temperature

The graph below shows the average sea temperature.

Petaluma average sea temperature chart (Celsius) Petaluma average sea temperature chart (Fahrenheit)
Average sea temperature around Petaluma 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.

Petaluma average winspeed by month (km/h) Petaluma average winspeed by month (mph)
Average wind speed in Petaluma (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 14 16 18 19 19 19 18 16 13 12 12
mph 7 9 10 11 12 12 12 11 10 8 8 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.

Petaluma relative humidity averages
Average relative humidity in Petaluma
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
80% 77% 73% 70% 68% 67% 67% 69% 68% 70% 77% 81%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Petaluma weather stats

Petaluma weather statistics
Hottest month: August 26.5°C 79.7°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.1hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 181mm 7.1ins
Warmest sea: September 14.4°C 57.9°F
Map showing location of Petaluma (38.23242, -122.63665) Petaluma map pin © Google

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