Lake Forest (CA) monthly weather averages

Average daytime temperature

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

Lake Forest average temperature chart (Celsius) Lake Forest average temperature chart (Fahrenheit)
Average monthly temperatures in Lake Forest (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.2 18.6 18.5 20.2 21.4 22.9 25.7 26.4 26 23.9 20.7 18.1
°F 64.7 65.5 65.3 68.4 70.5 73.2 78.2 79.5 78.8 75.1 69.2 64.6

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.

Lake Forest monthly rainfall chart (mm) Lake Forest monthly rainfall chart (inches)
Average monthly rainfall in Lake Forest (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 64 60 58 27 5 2 1 2 5 5 38 44
inches 2.5 2.4 2.3 1.1 0.2 0.1 0 0.1 0.2 0.2 1.5 1.7
Rainy days 5 5 6 4 1 1 0 1 1 2 4 5

Average annual rainfall in Lake Forest: 226.533mm (89.2 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Lake Forest

Lake Forest average daily sunshine chart
Average daily sunshine Lake Forest
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8 8.5 9.1 10.4 9.5 9.9 11.9 11.4 9.8 8.9 8 7.8

Day / night temperatures

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

Lake Forest average minimum / maximum temperatures (Celsius) Lake Forest average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Lake Forest (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 6.4 7.1 7.9 9.3 11.6 13.7 15.7 16.4 15.4 12.6 9.1 6.2
Max °C 18.5 18.9 18.8 20.5 21.6 23.1 25.9 26.7 26.3 24.2 21 18.4
Min °F 43.4 44.8 46.1 48.7 52.9 56.7 60.3 61.4 59.6 54.7 48.3 43.2
Max °F 54.3 55.4 55.9 58.8 61.9 65.1 69.4 70.7 69.4 65.1 59 54.1

Sea temperature

The graph below shows the average sea temperature.

Lake Forest average sea temperature chart (Celsius) Lake Forest average sea temperature chart (Fahrenheit)
Average sea temperature around Lake Forest in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.9 14.9 15.1 15.6 16.6 18 19.8 20.5 20.4 19.3 17.5 15.7
°F 58.8 58.8 59.3 60 61.8 64.4 67.6 69 68.8 66.7 63.5 60.2

Wind speed

The graph below shows the average wind speed.

Lake Forest average winspeed by month (km/h) Lake Forest average winspeed by month (mph)
Average wind speed in Lake Forest (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 12 13 14 14 14 13 13 12 12 11 10
mph 7 7 8 9 9 9 8 8 8 7 7 6

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.

Lake Forest relative humidity averages
Average relative humidity in Lake Forest
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 67% 66% 65% 67% 69% 69% 69% 69% 67% 66% 65%