El Cajon (CA) monthly weather averages

Average daytime temperature

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

El Cajon average temperature chart (Celsius) El Cajon average temperature chart (Fahrenheit)
Average monthly temperatures in El Cajon (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 17.7 18.5 18.7 20.7 22.6 25.1 28.4 28.9 27.7 25 21.2 18.4
°F 63.9 65.2 65.7 69.2 72.7 77.2 83.1 84.1 81.9 77 70.2 65.1

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.

El Cajon monthly rainfall chart (mm) El Cajon monthly rainfall chart (inches)
Average monthly rainfall in El Cajon (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 60 50 57 28 8 2 2 4 6 10 38 45
inches 2.4 2 2.2 1.1 0.3 0.1 0.1 0.1 0.2 0.4 1.5 1.8
Rainy days 6 5 6 4 2 1 1 1 1 2 4 5

Average annual rainfall in El Cajon: 224.033mm (88.2 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in El Cajon

El Cajon average daily sunshine chart
Average daily sunshine El Cajon
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.5 8.9 9.3 10.2 9.2 9.4 10.9 10.6 9.4 8.8 8.5 8.3

Day / night temperatures

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

El Cajon average minimum / maximum temperatures (Celsius) El Cajon average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in El Cajon (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 5.6 6.5 7.4 9.3 11.8 14 16.7 17.4 15.6 12.3 8.7 5.9
Max °C 18 18.8 19 21 22.9 25.4 28.7 29.2 28 25.3 21.6 18.7
Min °F 42.1 43.6 45.3 48.7 53.2 57.2 62.1 63.3 60.1 54.1 47.6 42.6
Max °F 53.2 54.7 55.8 59.2 63.1 67.5 72.9 73.9 71.2 65.8 59.2 54.1

Sea temperature

The graph below shows the average sea temperature.

El Cajon average sea temperature chart (Celsius) El Cajon average sea temperature chart (Fahrenheit)
Average sea temperature around El Cajon in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 15.4 15.3 15.6 16.2 17.1 18.3 20 20.9 20.9 19.8 18 16.2
°F 59.7 59.6 60.1 61.1 62.8 65 68 69.6 69.7 67.6 64.5 61.2

Wind speed

The graph below shows the average wind speed.

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

El Cajon relative humidity averages
Average relative humidity in El Cajon
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 65% 66% 65% 68% 70% 72% 72% 71% 68% 65% 64%