Crystal Lake Weather Forecast

    • 52
    • 67

    Mostly Cloudy

    • 60
    • 71

    Partly Sunny

    • 52
    • 69

    Chance Rain Showers

    • 51
    • 60

    Rain Showers

    • 38
    • 62

    Chance Rain Showers

    • 31
    • 44

    Mostly Sunny

Today 12 Oct Sullivan

Mostly cloudy. Not as cool with Highs in the upper 60s. North Winds 5 to 10 Mph.

Tonight 12 Oct Sullivan

Mostly cloudy. Mild. Lows in the lower 50s. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

October Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 6 October, 2026

    38.6 °F

  • Average October

    57.9 °F

  • Highest 2 October, 2026

    80.7 °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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