Lake Charleston Weather Forecast

    • 74
    • 94

    Mostly Sunny

    • 75
    • 92

    Slight Chance Thunderstorms

    • 74
    • 92

    Chance Thunderstorms

    • 73
    • 92

    Chance Thunderstorms

    • 73
    • 91

    Chance Thunderstorms

    • 72
    • 89

    Chance Thunderstorms

    • 72
    • 91

    Chance Thunderstorms

Today 23 Jun Coles

Mostly sunny. Near steady temperature in the lower 90s. Southwest Winds around 10 Mph with Gusts up to 20 Mph. Heat index Values up to 100.

Tonight 23 Jun Coles

Mostly clear. Lows in the mid 70s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Charleston Temperature Statistics

June Temperature

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

  • Lowest 2 June, 2025

    50.6 °F

  • Average June

    72.1 °F

  • Highest 21 June, 2025

    91 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    64.4 °F
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