Fullerton (CA) monthly weather averages

Contents

Average daytime temperature

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

Fullerton average temperature chart (Celsius) Fullerton average temperature chart (Fahrenheit)
Average monthly temperatures in Fullerton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 19.3 20.1 20 21.8 23.3 25.6 29.1 29.8 28.5 26.1 22.1 19.2
°F 66.7 68.2 67.9 71.2 73.9 78.1 84.4 85.7 83.3 78.9 71.8 66.6

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.

Fullerton monthly rainfall chart (mm) Fullerton monthly rainfall chart (inches)
Average monthly rainfall in Fullerton (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 82 70 63 29 6 2 1 3 8 7 46 49
inches 3.2 2.7 2.5 1.1 0.2 0.1 0 0.1 0.3 0.3 1.8 1.9
Rainy days 5 5 6 3 1 0 0 1 2 2 4 5

Average annual rainfall in Fullerton: 280.7mm (110.5 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Fullerton

Fullerton average daily sunshine chart
Average daily sunshine Fullerton
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.8 8.5 9.1 10.5 9.7 10.3 12.2 11.7 10 8.9 7.9 7.7

Day / night temperatures

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

Fullerton average minimum / maximum temperatures (Celsius) Fullerton average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Fullerton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 6.2 7.2 8 9.3 11.9 14.1 16.2 16.9 15.4 12.6 9 6.3
Max °C 19.6 20.4 20.3 22.1 23.6 25.9 29.5 30.2 28.8 26.4 22.5 19.6
Min °F 43.2 45 46.3 48.7 53.3 57.4 61.1 62.3 59.7 54.7 48.1 43.3
Max °F 55.2 56.8 57.4 60.3 63.9 68 73 74.3 71.8 67.1 60.3 55.2

Sea temperature

The graph below shows the average sea temperature.

Fullerton average sea temperature chart (Celsius) Fullerton average sea temperature chart (Fahrenheit)
Average sea temperature around Fullerton 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.

Fullerton average winspeed by month (km/h) Fullerton average winspeed by month (mph)
Average wind speed in Fullerton (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 11 10
mph 7 7 8 9 9 8 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.

Fullerton relative humidity averages
Average relative humidity in Fullerton
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 66% 65% 63% 65% 66% 66% 67% 67% 66% 65% 64%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Fullerton weather stats

Fullerton weather statistics
Hottest month: August 29.8°C 85.6°F
Driest month: July 1mm 0ins
Sunniest month: August 11.7hrs
Coldest month: January 19.3°C 66.7°F
Wettest month: January 82mm 3.2ins
Warmest sea: August 20.5°C 68.9°F
Map showing location of Fullerton (33.87029, -117.92534) Fullerton map pin © Google

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