Williamsport Regional Airport Weather Forecast

    • 18
    • 31

    Snow Showers Likely

    • 15
    • 25

    Mostly Cloudy

    • 19
    • 30

    Mostly Cloudy

    • 17
    • 30

    Mostly Cloudy

    • 20
    • 31

    Mostly Cloudy

    • 24
    • 35

    Slight Chance Snow Showers

Today 31 Dec Southern Lycoming

Mostly cloudy. Scattered snow Showers in the afternoon. Snow accumulation around half an inch. Highs in the upper 20s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of snow 30 percent.

Tonight 31 Dec Southern Lycoming

Cloudy. Near steady temperature in the lower 20s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

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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

    28.3 °F

  • Highest 19 December, 2025

    55.9 °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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