Johnstown Weather Forecast

    • 39
    • 60

    Breezy

    • 46
    • 68

    Mostly Sunny

    • 41
    • 63

    Mostly Sunny

    • 36
    • 60

    Mostly Sunny

    • 36
    • 61

    Mostly Sunny

    • 39
    • 58

    Chance Rain Showers

Today 19 Oct Cumberland

Sunny, breezy and much cooler with Highs in the lower 60s. Northwest Winds 15 to 25 Mph with Gusts up to 35 Mph.

Tonight 19 Oct Cumberland

Clear, cooler with Lows in the upper 30s. West Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming southwest around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnstown Temperature Statistics

October Temperature

Mattoon / Charleston, Coles County Memorial Airport (7.5 miles)

  • Lowest 9 October, 2025

    39.9 °F

  • Average October

    65.4 °F

  • Highest 3 October, 2025

    88 °F

Climate (2020–Present)

Mattoon / Charleston, Coles County Memorial Airport (7.5 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    64.6 °F
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