Johnstown Weather Forecast

    • 53
    • 82

    Mostly Sunny

    • 52
    • 82

    Mostly Sunny

    • 59
    • 79

    Partly Sunny

    • 58
    • 77

    Mostly Cloudy

    • 59
    • 81

    Slight Chance Rain Showers

    • 58
    • 81

    Chance Rain Showers

Today 18 Sep Cambria

Sunny. Very warm with Highs around 80. Northwest Winds 5 to 10 Mph.

Tonight 18 Sep Cambria

Mostly clear. Lows in the mid 50s. West Winds 5 to 10 Mph.

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Johnstown Temperature Statistics

September Temperature

Johnstown - Cambria County Airport (4.3 miles)

  • Lowest 8 September, 2025

    44.1 °F

  • Average September

    62.6 °F

  • Highest 14 September, 2025

    80.1 °F

Climate (2020–Present)

Johnstown - Cambria County Airport (4.3 miles)

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  • Average Low 2020–2025

    43 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    58.5 °F
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