Janesville Weather Forecast

    • 55
    • 81

    Mostly Sunny

    • 54
    • 77

    Partly Sunny

    • 53
    • 76

    Mostly Sunny

    • 61
    • 79

    Partly Sunny

    • 51
    • 76

    Rain Showers Likely

    • 43
    • 67

    Slight Chance Rain Showers

Today 14 Oct Cumberland

Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 14 Oct Cumberland

Partly cloudy. Near steady temperature in the mid 50s. Northeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Janesville Temperature Statistics

October Temperature

Mattoon / Charleston, Coles County Memorial Airport (6.8 miles)

  • Lowest 9 October, 2025

    39.9 °F

  • Average October

    66.4 °F

  • Highest 3 October, 2025

    88 °F

Climate (2020–Present)

Mattoon / Charleston, Coles County Memorial Airport (6.8 miles)

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

  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    64.6 °F
Get WillyWeather+ to remove ads