Weather in City of Fullerton in December

General weather information about City of Fullerton

Average annual temperature is 7.0 °C

Absolute maximum temperature: 36.1 °C

Absolute minimum temperature: -29.4 °C

Number of sunny days: 224 days

Number of rainy days: 108 days

Number of snow days: 33 days

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* Weather data for City of Fullerton United States is based on climate observations for 2026 year

City of Fullerton air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)1.94.00.517.829.934.236.132.033.528.813.612.7
Average daytime temperature (°C)-5.9-3.2-4.46.223.028.327.126.924.013.56.62.9
Average temperature (°C)-9.5-8.7-8.61.516.422.420.921.218.28.51.3-1.2
Average night temperature (°C)-12.4-13.2-12.0-2.410.216.615.616.813.54.6-2.5-4.2
Absolute minimum temperature (°C)-26.8-29.4-19.7-11.00.110.210.512.77.5-7.8-12.4-10.2

City of Fullerton monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.110.311.913.615.015.715.414.112.610.99.58.7
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.08.08.0
Sunshine mean duration (h)3.87.67.79.311.912.413.210.99.48.07.04.9
Precipitation (mm)181749514885571015325349
Sunny days242115132012172115182622
Rainy days2101411181410151148
Snow days5616300000201

City of Fullerton - weather forecast by months

City of Fullerton weather in januaryCity of Fullerton weather in februaryCity of Fullerton weather in marchCity of Fullerton weather in aprilCity of Fullerton weather in mayCity of Fullerton weather in juneCity of Fullerton weather in julyCity of Fullerton weather in augustCity of Fullerton weather in septemberCity of Fullerton weather in octoberCity of Fullerton weather in novemberCity of Fullerton weather in december

Best time to visit City of Fullerton:

The best time to visit City of Fullerton during the most sunny months:

  • May — 11.9(h)
  • June — 12.4(h)
  • July — 13.2(h)

Months with the longest average daylight duration in City of Fullerton:

  • June — 15.7(h)
  • July — 15.4(h)

The largest precipitation sum in City of Fullerton is at

  • June — 85(mm)
  • August — 101(mm)

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    Frequently asked questions

    When is the best time to visit City of Fullerton?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit City of Fullerton.
    What is the weather like in City of Fullerton?
    See average temperature, rainfall and daylight hours for City of Fullerton by month in the table above.
    How many sunny days does City of Fullerton have?
    The monthly weather statistics above show sunshine and rainfall patterns for City of Fullerton throughout the year.