Fountain Valley (CA) monthly weather averages

Average daytime temperature

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

Fountain Valley average temperature chart (Celsius) Fountain Valley average temperature chart (Fahrenheit)
Average monthly temperatures in Fountain Valley (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.9 19.5 19.4 21.2 22.1 23.6 26.4 27.3 26.7 24.9 21.6 18.8
°F 66 67 67 70.1 71.8 74.5 79.6 81.2 80.1 76.8 70.8 65.8

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.

Fountain Valley monthly rainfall chart (mm) Fountain Valley monthly rainfall chart (inches)
Average monthly rainfall in Fountain Valley (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 66 55 49 24 4 1 1 2 5 5 37 40
inches 2.6 2.2 1.9 0.9 0.2 0 0 0.1 0.2 0.2 1.5 1.6
Rainy days 5 5 6 3 1 0 0 0 1 2 4 5

Average annual rainfall in Fountain Valley: 204.133mm (80.4 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Fountain Valley

Fountain Valley average daily sunshine chart
Average daily sunshine Fountain Valley
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.9 8.5 9.1 10.5 9.5 9.9 12 11.5 9.9 8.9 8 7.8

Day / night temperatures

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

Fountain Valley average minimum / maximum temperatures (Celsius) Fountain Valley average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Fountain Valley (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 6.6 7.7 8.5 10 12.3 14.4 16.1 16.8 15.6 13 9.6 6.7
Max °C 19.2 19.8 19.7 21.5 22.4 23.9 26.7 27.6 27 25.2 21.9 19.1
Min °F 43.9 45.8 47.3 49.9 54.1 57.8 61 62.2 60.1 55.4 49.2 44.1
Max °F 55.2 56.7 57.4 60.3 63.1 66.4 70.5 72 70.3 66.4 60.3 55.2

Sea temperature

The graph below shows the average sea temperature.

Fountain Valley average sea temperature chart (Celsius) Fountain Valley average sea temperature chart (Fahrenheit)
Average sea temperature around Fountain Valley 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.

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

Fountain Valley relative humidity averages
Average relative humidity in Fountain Valley
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 67% 67% 65% 67% 69% 68% 69% 69% 67% 66% 65%