Crystal Lake Weather Forecast

    • 24
    • 39

    Partly Sunny

    • 38
    • 48

    Chance Rain Showers

    • 40
    • 60

    Partly Sunny

    • 45
    • 66

    Mostly Sunny

    • 47
    • 67

    Chance Rain Showers

    • 44
    • 58

    Chance Rain Showers

Today 20 Apr Sullivan

Partly sunny. Highs around 40. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 20 Apr Sullivan

Partly cloudy in the Evening, then clearing. Widespread frost after midnight. Lows in the lower 20s. Northwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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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

    56.2 °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

    52.9 °F

  • Average High 2021–2026

    63.2 °F
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