Johnstown Weather Forecast

    • 65
    • 84

    Rain Showers

    • 63
    • 79

    Rain Showers

    • 63
    • 79

    Rain Showers Likely

    • 58
    • 77

    Chance Thunderstorms

    • 55
    • 76

    Slight Chance Thunderstorms

    • 58
    • 75

    Partly Sunny

Today 10 Aug Cambria

Mostly cloudy. A chance of Showers and Thunderstorms in the Morning, then Showers likely with Thunderstorms in the afternoon. Some Thunderstorms may produce gusty Winds, small Hail, and heavy rainfall. Humid with Highs in the lower 80s. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 80 percent.

Tonight 10 Aug Cambria

Mostly cloudy. Showers likely in the Evening, then a chance of Showers and Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall after midnight. Humid with Lows in the mid 60s. West Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

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Johnstown Temperature Statistics

August Temperature

Johnstown - Cambria County Airport (4.3 miles)

  • Lowest 4 August, 2026

    57.7 °F

  • Average August

    70.9 °F

  • Highest 6 August, 2026

    81.6 °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

    50.6 °F

  • Average High 2021–2026

    58.7 °F
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