Williamsport Regional Airport Weather Forecast

    • 18
    • 33

    Increasing Clouds

    • 19
    • 36

    Snow Showers Likely

    • 15
    • 24

    Mostly Cloudy

    • 16
    • 28

    Mostly Cloudy

    • 21
    • 32

    Mostly Cloudy

    • 29
    • 42

    Mostly Cloudy

    • 29
    • 45

    Chance Rain Showers

Today 12 Dec Southern Lycoming

Mostly sunny. Highs in the lower 30s. West Winds 5 to 10 Mph.

Tonight 12 Dec Southern Lycoming

Partly cloudy this Evening, then becoming mostly cloudy. Lows around 15. West Winds around 5 Mph, becoming southeast after midnight.

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Williamsport Regional Airport Temperature Statistics

December Temperature

Williamsport - Lycoming County Airport (0 miles)

  • Lowest 9 December, 2025

    6.1 °F

  • Average December

    28.1 °F

  • Highest 1 December, 2025

    37 °F

Climate (2020–Present)

Williamsport - Lycoming County Airport (0 miles)

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  • Average Low 2020–2025

    43.8 °F

  • Average 2020–2025

    53 °F

  • Average High 2020–2025

    63.2 °F
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