Williamsport Weather Forecast

    • 48
    • 77

    Becoming Sunny

    • 48
    • 77

    Sunny

    • 52
    • 79

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 56
    • 84

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

Today 7 Sep Washington

Mostly sunny. A slight chance of Showers this morning. Highs in the mid 70s. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 7 Sep Washington

Clear. Lows in the upper 40s. Northwest Winds 5 to 10 Mph.

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Williamsport Temperature Statistics

September Temperature

Hagerstown, Washington County Regional Airport (8.7 miles)

  • Lowest 1 September, 2025

    52 °F

  • Average September

    69.2 °F

  • Highest 3 September, 2025

    82 °F

Climate (2020–Present)

Hagerstown, Washington County Regional Airport (8.7 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    56.8 °F

  • Average High 2020–2025

    65.9 °F
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