Best year time to visit Fullerton

General weather information about 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

Look at detailed online map of Fullerton

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

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

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

Fullerton - weather forecast by months

Fullerton weather in januaryFullerton weather in februaryFullerton weather in marchFullerton weather in aprilFullerton weather in mayFullerton weather in juneFullerton weather in julyFullerton weather in augustFullerton weather in septemberFullerton weather in octoberFullerton weather in novemberFullerton weather in december

Best time to visit Fullerton:

The best time to visit 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 Fullerton:

  • June — 15.7(h)
  • July — 15.4(h)

The largest precipitation sum in Fullerton is at

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

    • Weather forecast in the closest to Fullerton admin centers

    Weather forecast in the closest towns to Fullerton

    Explore Fullerton

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

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