Johnstown Weather Forecast

    • 29
    • 66

    Becoming Sunny

    • 40
    • 50

    Partly Sunny

    • 32
    • 56

    Mostly Cloudy

    • 45
    • 54

    Mostly Cloudy

    • 22
    • 63

    Rain

    • 14
    • 31

    Partly Sunny

    • 25
    • 35

    Mostly Cloudy

Today 11 Mar Cumberland

Rain likely. Cooler with Highs in the mid 60s. Temperature falling into the lower 40s late. Northwest Winds around 20 Mph with Gusts up to 35 Mph. Chance of rain 70 percent.

Tonight 11 Mar Cumberland

Mostly cloudy in the Evening, then clearing. Much cooler with Lows in the upper 20s. Northwest Winds 15 to 20 Mph. Gusts up to 35 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnstown Temperature Statistics

March Temperature

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

  • Lowest 1 March, 2026

    24.7 °F

  • Average March

    48.8 °F

  • Highest 6 March, 2026

    75 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    64.8 °F
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