Rose Valley Lake Weather Forecast

    • 22
    • 23

    Chance Snow

    • 21
    • 36

    Snow

    • 20
    • 29

    Mostly Cloudy

    • 18
    • 29

    Chance Snow

    • 19
    • 31

    Chance Snow

    • 10
    • 26

    Mostly Cloudy

    • 13
    • 24

    Slight Chance Snow

Today 9 Dec Northern Lycoming

Cloudy with a 20 percent chance of snow. Near steady temperature in the lower 20s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Dec Northern Lycoming

Cloudy. A chance of snow after midnight. Snow accumulation up to 1 inch possible. Not as cool with Lows in the lower 20s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of snow 50 percent.

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Rose Valley Lake Temperature Statistics

December Temperature

Williamsport - Lycoming County Airport (10.6 miles)

  • Lowest 5 December, 2025

    10.9 °F

  • Average December

    29.9 °F

  • Highest 1 December, 2025

    37 °F

Climate (2020–Present)

Williamsport - Lycoming County Airport (10.6 miles)

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  • Average Low 2020–2025

    43.8 °F

  • Average 2020–2025

    53 °F

  • Average High 2020–2025

    63.3 °F
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