Williamsport Weather Forecast

    • 71
    • 88

    Thunderstorms

    • 69
    • 88

    Chance Thunderstorms

    • 63
    • 83

    Partly Sunny

    • 61
    • 83

    Mostly Sunny

    • 62
    • 85

    Mostly Sunny

    • 57
    • 84

    Mostly Sunny

Today 18 Aug Warren

Partly cloudy with scattered Showers with isolated Thunderstorms. Highs in the upper 80s. South Winds around 5 Mph. Chance of rain 50 percent.

Tonight 18 Aug Warren

Partly cloudy with isolated Showers and Thunderstorms through Midnight, then mostly cloudy with scattered Showers and Thunderstorms toward daybreak. Humid with Lows in the lower 70s. Southeast Winds around 5 Mph through Midnight, becoming light and variable. Chance of rain 40 percent.

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Williamsport Temperature Statistics

August Temperature

Danville, Vermilion County Airport (16.8 miles)

  • Lowest 3 August, 2025

    53.8 °F

  • Average August

    75 °F

  • Highest 16 August, 2025

    94.1 °F

Climate (2020–Present)

Danville, Vermilion County Airport (16.8 miles)

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  • Average Low 2020–2025

    44.2 °F

  • Average 2020–2025

    53.9 °F

  • Average High 2020–2025

    63.7 °F
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