Crystal Lake Weather Forecast

    • 43
    • 62

    Sunny

    • 36
    • 60

    Mostly Sunny

    • 36
    • 58

    Mostly Sunny

    • 39
    • 59

    Mostly Sunny

    • 34
    • 56

    Sunny

    • 36
    • 57

    Mostly Sunny

Today 19 Oct Sullivan

Widespread frost this morning. Sunny. Highs in the lower 60s. Light and variable Winds, becoming north around 5 Mph this afternoon.

Tonight 19 Oct Sullivan

Mostly clear. Lows around 40. North Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight.

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  • Temperature Real-Time

Crystal Lake Temperature Statistics

October Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 17 October, 2026

    34 °F

  • Average October

    59.3 °F

  • Highest 13 October, 2026

    84.7 °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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