Mattoon Weather Forecast

    • 54
    • 76

    Slight Chance Thunderstorms

    • 56
    • 70

    Chance Rain Showers

    • 56
    • 68

    Rain Showers Likely

    • 56
    • 74

    Chance Rain Showers

    • 54
    • 75

    Chance Rain Showers

    • 51
    • 70

    Slight Chance Rain Showers

Today 18 Sep Shawano

Mostly cloudy with a slight chance of Showers and Thunderstorms. Highs in the upper 70s. Light and variable wind becoming east 5 to 10 Mph in the afternoon. Chance of rain 20 percent.

Tonight 18 Sep Shawano

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the middle 50s. East wind 5 to 10 Mph. Chance of rain 20 percent.

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Mattoon Temperature Statistics

September Temperature

Langlade County Airport (10.6 miles)

  • Lowest 4 September, 2025

    35.8 °F

  • Average September

    56.8 °F

  • Highest 15 September, 2025

    79.9 °F

Climate (2020–Present)

Langlade County Airport (10.6 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    42.7 °F

  • Average High 2020–2025

    52 °F
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