Crystal Lake Weather Forecast

    • 18
    • 26

    Mostly Cloudy

    • 24
    • 28

    Chance Snow

    • 33
    • 36

    Rain Likely

    • 29
    • 41

    Mostly Cloudy

    • 35
    • 42

    Rain Likely

    • 36
    • 44

    Rain Likely

    • 26
    • 43

    Chance Rain

Today 4 Jan Sullivan

Mostly cloudy. Near steady temperature in the mid 20s. Northwest Winds 5 to 10 Mph.

Tonight 4 Jan Sullivan

Mostly cloudy. Lows around 20. West 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

    21 °F

  • Highest 1 January, 2026

    28.9 °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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