Best year time to visit Fullerton

General weather information about Fullerton

Average annual temperature is 21.5 °C

Absolute maximum temperature: 41.6 °C

Absolute minimum temperature: 1.1 °C

Number of sunny days: 131 days

Number of rainy days: 234 days

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* 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)25.126.828.829.031.636.838.341.638.834.629.024.8
Average daytime temperature (°C)18.820.123.324.428.533.635.338.034.027.120.518.7
Average temperature (°C)14.114.818.519.423.527.729.631.328.021.715.713.3
Average night temperature (°C)10.610.914.715.719.523.625.426.223.517.712.19.3
Absolute minimum temperature (°C)2.21.13.49.913.019.522.822.019.28.14.02.2

Fullerton monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.013.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.511.112.012.913.714.013.913.212.311.410.710.2
Daylight minimum duration (h)10.010.011.012.013.013.013.012.011.011.010.010.0
Sunshine mean duration (h)6.17.17.37.88.410.912.112.110.78.46.67.5
Precipitation (mm)2501031302392177746958147142144
Sunny days111054578219161520
Rainy days201826262623231021151511
Snow days000000000000

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:

  • June — 10.9(h)
  • July — 12.1(h)
  • August — 12.1(h)

The largest precipitation sum in Fullerton is at

  • January — 250(mm)
  • April — 239(mm)
  • May — 217(mm)

    • Weather forecast in the closest to Fullerton admin centers

    Weather forecast in the closest towns to Fullerton

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    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.