Casey Weather Forecast

    • 60
    • 82

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 63
    • 83

    Partly Sunny

    • 65
    • 85

    Slight Chance Thunderstorms

    • 64
    • 85

    Mostly Sunny

    • 64
    • 84

    Mostly Sunny

Today 22 Aug Clark

Sunny. Near steady temperature in the lower 80s. Northwest Winds 10 to 15 Mph.

Tonight 22 Aug Clark

Mostly clear. Lows around 60. Northwest Winds around 5 Mph.

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Casey Temperature Statistics

August Temperature

Mattoon / Charleston, Coles County Memorial Airport (19.3 miles)

  • Lowest 3 August, 2026

    61.6 °F

  • Average August

    76.9 °F

  • Highest 10 August, 2026

    91.7 °F

Climate (2021–2026)

Mattoon / Charleston, Coles County Memorial Airport (19.3 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    65 °F
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