Crystal Lake Weather Forecast

    • 64
    • 78

    Rain Showers Likely

    • 60
    • 79

    Slight Chance Rain Showers

    • 60
    • 77

    Partly Sunny

    • 55
    • 76

    Chance Rain Showers

    • 54
    • 72

    Mostly Sunny

    • 55
    • 72

    Partly Sunny

Today 10 Aug Sullivan

Mostly cloudy. A chance of Showers this Morning, then Showers likely with a chance of Thunderstorms this afternoon. Some Thunderstorms may be severe with damaging Winds. Locally heavy rainfall possible this afternoon. Highs in the upper 70s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 10 Aug Sullivan

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers after midnight. Some Thunderstorms may be severe with damaging Winds. Humid with Lows in the mid 60s. West Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

August Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 4 August, 2026

    58.6 °F

  • Average August

    74.8 °F

  • Highest 6 August, 2026

    89.7 °F

Climate (2021–2026)

Williamsport - Lycoming County Airport (14.3 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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