Crystal Lake Weather Forecast

    • 65
    • 71

    Rain Showers Likely

    • 66
    • 80

    Rain Showers Likely

    • 65
    • 77

    Rain Showers Likely

    • 61
    • 80

    Rain Showers Likely

    • 58
    • 76

    Partly Sunny

    • 56
    • 72

    Partly Sunny

Today 31 Aug Sullivan

Mostly cloudy. A chance of Showers this Morning, then Showers likely with a slight chance of Thunderstorms this afternoon. Highs in the lower 70s. Southwest Winds around 5 Mph. Chance of rain 70 percent.

Tonight 31 Aug Sullivan

Mostly cloudy with a slight chance of Thunderstorms. Showers Likely, mainly in the evening. Humid with Lows in the mid 60s. Southwest Winds around 5 Mph. Chance of rain 70 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 24 August, 2026

    55.7 °F

  • Average August

    73 °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

    43.5 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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