Johnstown Weather Forecast

    • 52
    • 61

    Rain Showers

    • 48
    • 60

    Rain Showers

    • 47
    • 59

    Chance Rain Showers

    • 44
    • 58

    Slight Chance Rain Showers

    • 44
    • 64

    Partly Sunny

    • 46
    • 67

    Partly Sunny

Today 21 Sep Cambria

Mostly cloudy. A chance of Showers in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Cooler with Highs in the upper 50s. East Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 21 Sep Cambria

Showers. Lows in the lower 50s. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.

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Johnstown Temperature Statistics

September Temperature

Johnstown - Cambria County Airport (4.3 miles)

  • Lowest 14 September, 2026

    49.6 °F

  • Average September

    69.2 °F

  • Highest 2 September, 2026

    85.6 °F

Climate (2021–2026)

Johnstown - Cambria County Airport (4.3 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    58.7 °F
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