Crystal Lake Weather Forecast

    • 61
    • 79

    Chance Thunderstorms

    • 57
    • 77

    Chance Rain Showers

    • 51
    • 67

    Chance Rain Showers

    • 42
    • 70

    Rain Showers Likely

    • 28
    • 51

    Chance Rain Showers

    • 26
    • 41

    Mostly Sunny

    • 41
    • 54

    Chance Rain Showers

Today 15 Apr Sullivan

Mostly sunny with a slight chance of Showers and Thunderstorms. Continued Unseasonably warm with Highs around 80. West Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 15 Apr Sullivan

Mostly cloudy with a chance of Showers and Thunderstorms. Unseasonably mild. Lows in the lower 60s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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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

    51.2 °F

  • Highest 13 April, 2026

    82 °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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