San Diego (CA) monthly weather averages

Average daytime temperature

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

San Diego average temperature chart (Celsius) San Diego average temperature chart (Fahrenheit)
Average monthly temperatures in San Diego (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.4 18.9 18.9 20.3 21.3 23.2 25.9 26.7 26 24.2 21.2 18.8
°F 65.1 66 66.1 68.6 70.3 73.7 78.7 80.1 78.9 75.5 70.2 65.9

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 Diego monthly rainfall chart (mm) San Diego monthly rainfall chart (inches)
Average monthly rainfall in San Diego (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 53 43 51 23 5 2 1 2 4 8 33 37
inches 2.1 1.7 2 0.9 0.2 0.1 0 0.1 0.2 0.3 1.3 1.5
Rainy days 6 5 6 4 2 1 1 1 1 2 4 5

Average daily sunshine

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

San Diego average daily sunshine chart
Average daily sunshine San Diego
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.5 8.8 9.1 10 8.9 9 10.7 10.4 9.2 8.6 8.4 8.2

Day / night temperatures

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

San Diego average minimum / maximum temperatures (Celsius) San Diego average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Diego (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 7.4 8.3 9.5 11.1 13.3 15.1 17.5 18.3 17 14 10.3 7.5
Max °C 18.7 19.2 19.2 20.6 21.5 23.4 26.2 26.9 26.3 24.4 21.5 19.1
Min °F 45.2 46.9 49 51.9 55.9 59.1 63.4 64.9 62.5 57.2 50.5 45.5
Max °F 55.4 56.7 57.7 60.4 63.3 66.6 71.2 72.7 70.9 66.6 60.6 55.9

Sea temperature

The graph below shows the average sea temperature.

San Diego average sea temperature chart (Celsius) San Diego average sea temperature chart (Fahrenheit)
Average sea temperature around San Diego in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 15.2 15.1 15.4 15.8 16.8 18 19.7 20.5 20.5 19.4 17.7 15.9
°F 59.3 59.2 59.6 60.5 62.2 64.4 67.4 68.9 68.9 67 63.9 60.7

Wind speed

The graph below shows the average wind speed.

San Diego average winspeed by month (km/h) San Diego average winspeed by month (mph)
Average wind speed in San Diego (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 13 14 15 15 14 14 14 13 12 12 11
mph 7 8 9 9 9 9 9 9 8 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.

San Diego relative humidity averages
Average relative humidity in San Diego
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 66% 67% 66% 70% 72% 73% 73% 72% 69% 66% 65%
San Diego

Other monthly averages

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San Diego weather stats

San Diego weather statistics
Hottest month: August 26.7°C 80.1°F
Driest month: July 1mm 0ins
Sunniest month: January 8.5hrs
Coldest month: January 18.4°C 65.1°F
Wettest month: January 53mm 2.1ins
Warmest sea: September 20.5°C 68.9°F
Map showing location of San Diego (32.71533, -117.15726)

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