San Dimas (CA) monthly weather averages

Average daytime temperature

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

San Dimas average temperature chart (Celsius) San Dimas average temperature chart (Fahrenheit)
Average monthly temperatures in San Dimas (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.2 19.5 19.6 22 24.4 27.9 32.2 32.4 30 26.4 21.4 18.1
°F 64.7 67 67.2 71.5 75.9 82.2 89.9 90.3 86 79.5 70.6 64.5

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 Dimas monthly rainfall chart (mm) San Dimas monthly rainfall chart (inches)
Average monthly rainfall in San Dimas (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 90 90 79 31 9 1 1 4 10 9 49 62
inches 3.5 3.6 3.1 1.2 0.4 0.1 0.1 0.2 0.4 0.4 1.9 2.4
Rainy days 5 5 6 3 1 0 0 1 2 2 4 4

Average annual rainfall in San Dimas: 352.733mm (138.9 inches)

Average daily sunshine

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

San Dimas average daily sunshine chart
Average daily sunshine San Dimas
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.7 8.4 9 10.5 10 10.8 12.2 11.7 10.2 9.1 7.9 7.6

Day / night temperatures

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

San Dimas average minimum / maximum temperatures (Celsius) San Dimas average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Dimas (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4.3 5.4 6.1 7.7 10.7 13.4 16.1 16.5 14.4 11.1 7 4.2
Max °C 18.5 19.8 19.9 22.3 24.7 28.3 32.6 32.8 30.4 26.8 21.8 18.4
Min °F 39.7 41.7 43 45.9 51.3 56 60.9 61.6 57.9 51.9 44.6 39.6
Max °F 52.5 54.7 55.4 59 63.9 69.4 75.7 76.3 72.3 66 57.9 52.3

Sea temperature

The graph below shows the average sea temperature.

San Dimas average sea temperature chart (Celsius) San Dimas average sea temperature chart (Fahrenheit)
Average sea temperature around San Dimas in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.6 14.5 14.7 15 15.8 17.2 18.9 19.7 19.6 18.6 17 15.3
°F 58.2 58.1 58.4 58.9 60.5 62.9 66 67.5 67.3 65.6 62.6 59.6

Wind speed

The graph below shows the average wind speed.

San Dimas average winspeed by month (km/h) San Dimas average winspeed by month (mph)
Average wind speed in San Dimas (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 12 14 14 14 14 14 13 13 12 11 10
mph 7 8 9 9 9 9 9 8 8 7 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 Dimas relative humidity averages
Average relative humidity in San Dimas
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
63% 64% 63% 60% 61% 62% 62% 63% 63% 62% 63% 63%