Crystal Lake Weather Forecast

    • 42
    • 64

    Mostly Sunny

    • 46
    • 56

    Chance Rain Showers

    • 42
    • 56

    Rain Showers

    • 35
    • 52

    Slight Chance Rain Showers

    • 34
    • 52

    Slight Chance Snow Showers

    • 33
    • 50

    Chance Rain Showers

Today 27 Apr Sullivan

Sunny. Highs in the mid 60s. East Winds around 5 Mph.

Tonight 27 Apr Sullivan

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 40s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

April Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 8 April, 2026

    22.6 °F

  • Average April

    56 °F

  • Highest 16 April, 2026

    90.6 °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

    53 °F

  • Average High 2021–2026

    63.3 °F
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