Crystal Lake Weather Forecast

    • 60
    • 78

    Rain Showers Likely

    • 59
    • 77

    Mostly Sunny

    • 59
    • 77

    Partly Sunny

    • 54
    • 72

    Partly Sunny

    • 56
    • 73

    Partly Sunny

    • 58
    • 73

    Chance Rain Showers

Today 17 Aug Sullivan

Partly sunny. Patchy fog in the morning. Showers with a chance of Thunderstorms in the afternoon. Humid with Highs in the upper 70s. Northwest Winds around 5 Mph. Chance of rain 80 percent.

Tonight 17 Aug Sullivan

Mostly cloudy. Patchy fog. Near steady temperature in the mid 60s. Southwest Winds around 5 Mph.

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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

    75.5 °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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