Fullerton Weather Forecast

    • 69
    • 80

    Isolated Thunderstorms

    • 72
    • 86

    Partly Sunny

    • 74
    • 92

    Mostly Sunny

    • 71
    • 92

    Chance Thunderstorms

    • 72
    • 88

    Rain Showers Likely

    • 71
    • 88

    Chance Thunderstorms

    • 71
    • 89

    Slight Chance Thunderstorms

Today 21 Jul De Witt

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 80s. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 21 Jul De Witt

Mostly cloudy with a slight chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows around 70. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fullerton Temperature Statistics

July Temperature

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (20.5 miles)

  • Lowest 18 July, 2025

    64 °F

  • Average July

    76.6 °F

  • Highest 4 July, 2025

    91 °F

Climate (2020–Present)

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (20.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    62 °F
Get WillyWeather+ to remove ads