Crystal Lake Weather Forecast

    • 14
    • 26

    Mostly Cloudy

    • 5
    • 24

    Mostly Cloudy

    • 5
    • 13

    Partly Sunny

    • 21
    • 25

    Slight Chance Snow Showers

    • 9
    • 29

    Slight Chance Snow Showers

    • 10
    • 20

    Mostly Cloudy

    • 4
    • 19

    Chance Snow Showers

Today 18 Jan Sullivan

Mostly cloudy. Highs in the upper 20s. Northwest Winds around 5 Mph.

Tonight 18 Jan Sullivan

Mostly cloudy. Colder with Lows around 15. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

January Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 1 January, 2026

    14 °F

  • Average January

    31.4 °F

  • Highest 8 January, 2026

    50 °F

Climate (2021–Present)

Williamsport - Lycoming County Airport (14.3 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.2 °F
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