Johnstown Weather Forecast

    • 16
    • 29

    Increasing Clouds

    • 12
    • 33

    Snow Showers

    • 12
    • 18

    Chance Snow Showers

    • 13
    • 20

    Mostly Cloudy

    • 24
    • 32

    Mostly Cloudy

    • 34
    • 42

    Chance Rain Showers

    • 29
    • 49

    Rain Showers Likely

Today 12 Dec Cambria

Mostly sunny. Highs in the upper 20s. West Winds around 5 Mph.

Tonight 12 Dec Cambria

Partly cloudy this Evening, then becoming mostly cloudy. Lows around 15. Temperature rising into the lower 20s after midnight. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnstown Temperature Statistics

December Temperature

Johnstown - Cambria County Airport (4.3 miles)

  • Lowest 9 December, 2025

    9 °F

  • Average December

    24.9 °F

  • Highest 10 December, 2025

    41 °F

Climate (2020–Present)

Johnstown - Cambria County Airport (4.3 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    58.4 °F
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