Grimesville Weather Forecast

    • 67
    • 74

    Rain Showers

    • 62
    • 84

    Chance Rain Showers

    • 60
    • 83

    Mostly Sunny

    • 61
    • 83

    Chance Thunderstorms

    • 56
    • 79

    Partly Sunny

    • 59
    • 79

    Partly Sunny

Today 16 Aug Southern Lycoming

A chance of Showers this Morning, then Showers with a chance of Thunderstorms this afternoon. Highs in the mid 70s. Southeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

Tonight 16 Aug Southern Lycoming

Showers. A chance of Thunderstorms, mainly in the evening. Humid with Lows in the upper 60s. Southeast Winds 5 to 10 Mph. Chance of rain near 100 percent.

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Grimesville Temperature Statistics

August Temperature

Williamsport - Lycoming County Airport (7.5 miles)

  • Lowest 4 August, 2026

    58.6 °F

  • Average August

    75.7 °F

  • Highest 6 August, 2026

    89.7 °F

Climate (2021–2026)

Williamsport - Lycoming County Airport (7.5 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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