Grimesville Weather Forecast

    • 43
    • 66

    Rain Showers

    • 45
    • 59

    Slight Chance Rain Showers

    • 48
    • 70

    Partly Sunny

    • 57
    • 79

    Partly Sunny

    • 57
    • 81

    Chance Rain Showers

    • 62
    • 86

    Slight Chance Thunderstorms

    • 63
    • 90

    Chance Rain Showers

Today 13 May Southern Lycoming

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the mid 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 13 May Southern Lycoming

Showers with a chance of Thunderstorms this evening. Patchy fog after midnight. Lows in the mid 40s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph, becoming northwest after midnight. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grimesville Temperature Statistics

May Temperature

Williamsport - Lycoming County Airport (7.5 miles)

  • Lowest 4 May, 2026

    34.6 °F

  • Average May

    53.9 °F

  • Highest 5 May, 2026

    81.6 °F

Climate (2021–Present)

Williamsport - Lycoming County Airport (7.5 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    63.2 °F
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