Keystone State Park Weather Forecast

    • 24
    • 35

    Mostly Cloudy

    • 25
    • 37

    Mostly Cloudy

    • 19
    • 38

    Chance Rain/Snow

    • 11
    • 28

    Chance Snow

    • 27
    • 35

    Snow Likely

    • 24
    • 39

    Rain/Snow

Today 5 Dec Westmoreland

Considerable cloudiness. Highs in the mid 30s. Southeast Winds around 5 Mph, becoming south around 5 Mph in the afternoon.

Tonight 5 Dec Westmoreland

Considerable cloudiness. Lows in the lower 20s. Southwest Winds 5 to 10 Mph.

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Keystone State Park Temperature Statistics

December Temperature

Latrobe / Westmorland (5.6 miles)

  • Lowest 1 December, 2025

    28.4 °F

  • Average December

    31.9 °F

  • Highest 1 December, 2025

    35.6 °F

Climate (2020–Present)

Latrobe / Westmorland (5.6 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    62.6 °F
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