Crystal Lake Weather Forecast

    • 20
    • 35

    Becoming Sunny

    • 28
    • 46

    Sunny

    • 35
    • 52

    Partly Sunny

    • 38
    • 63

    Chance Rain Showers

    • 33
    • 53

    Mostly Sunny

    • 46
    • 58

    Mostly Cloudy

    • 54
    • 70

    Mostly Cloudy

Today 7 Apr Sullivan

Sunny. Highs in the mid 30s. Northwest Winds 10 to 15 Mph with Gusts up to 35 Mph.

Tonight 7 Apr Sullivan

Clear, Colder with Lows around 20. North Winds 10 to 15 Mph with Gusts up to 30 Mph, Diminishing to around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

April Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 1 April, 2026

    42.7 °F

  • Average April

    53.2 °F

  • Highest 4 April, 2026

    75 °F

Climate (2021–Present)

Williamsport - Lycoming County Airport (14.3 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    63.2 °F
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