Mattoon Weather Forecast

    • 61
    • 90

    Sunny

    • 58
    • 90

    Mostly Sunny

    • 60
    • 91

    Mostly Sunny

    • 62
    • 91

    Partly Sunny

    • 62
    • 89

    Chance Rain Showers

    • 62
    • 85

    Chance Rain Showers

    • 61
    • 82

    Chance Rain Showers

Today 15 Sep Coles

Sunny. Highs around 90. East Winds around 5 Mph.

Tonight 15 Sep Coles

Clear. Lows around 60. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mattoon Temperature Statistics

September Temperature

Mattoon / Charleston, Coles County Memorial Airport (5 miles)

  • Lowest 7 September, 2025

    45 °F

  • Average September

    66.7 °F

  • Highest 13 September, 2025

    91.9 °F

Climate (2020–Present)

Mattoon / Charleston, Coles County Memorial Airport (5 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    64.5 °F
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