Crystal Lake Weather Forecast

    • 37
    • 60

    Becoming Sunny

    • 39
    • 57

    Sunny

    • 47
    • 63

    Mostly Sunny

    • 45
    • 65

    Mostly Sunny

    • 44
    • 63

    Partly Sunny

    • 44
    • 62

    Partly Sunny

Today 5 Oct Sullivan

Patchy dense fog this morning. Mostly sunny. Highs in the upper 50s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 5 Oct Sullivan

Mostly clear. Cooler with Lows in the upper 30s. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

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Crystal Lake Temperature Statistics

October Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 3 October, 2026

    48 °F

  • Average October

    64.4 °F

  • Highest 2 October, 2026

    78.1 °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

    53.1 °F

  • Average High 2021–2026

    63.3 °F
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