South Williamsport Weather Forecast

    • 62
    • 81

    Partly Sunny

    • 69
    • 84

    Rain Showers Likely

    • 59
    • 86

    Chance Thunderstorms

    • 55
    • 80

    Mostly Sunny

    • 61
    • 81

    Chance Rain Showers

    • 66
    • 85

    Chance Rain Showers

Today 18 Jul Southern Lycoming

Mostly sunny. Highs in the upper 70s. Northwest Winds 5 to 10 Mph.

Tonight 18 Jul Southern Lycoming

Mostly clear in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the lower 60s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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South Williamsport Temperature Statistics

July Temperature

Williamsport - Lycoming County Airport (3.7 miles)

  • Lowest 4 July, 2025

    56.6 °F

  • Average July

    76.4 °F

  • Highest 7 July, 2025

    91.7 °F

Climate (2020–Present)

Williamsport - Lycoming County Airport (3.7 miles)

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  • Average Low 2020–2025

    44 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.4 °F
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