Crystal Lake Weather Forecast

    • 53
    • 65

    Mostly Cloudy

    • 54
    • 68

    Chance Rain Showers

    • 60
    • 72

    Partly Sunny

    • 61
    • 74

    Rain Showers Likely

    • 57
    • 75

    Chance Rain Showers

    • 58
    • 73

    Partly Sunny

Today 24 Aug Sullivan

Partly sunny this Morning, then becoming mostly cloudy. Patchy dense fog this morning. Highs in the upper 60s. Southwest Winds 5 to 10 Mph.

Tonight 24 Aug Sullivan

Mostly cloudy. Lows in the lower 50s. West 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 21 August, 2026

    56.6 °F

  • Average August

    73.9 °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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