Crystal Lake Weather Forecast

    • 58
    • 74

    Thunderstorms Likely

    • 61
    • 77

    Chance Thunderstorms

    • 57
    • 77

    Chance Rain Showers

    • 52
    • 67

    Chance Rain Showers

    • 46
    • 71

    Rain Showers Likely

    • 30
    • 55

    Rain Showers Likely

    • 26
    • 42

    Mostly Sunny

Today 14 Apr Sullivan

Partly sunny with a chance of Showers and Thunderstorms. Unseasonably warm. Near steady temperature in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 40 percent.

Tonight 14 Apr Sullivan

Mostly cloudy. Showers and Thunderstorms likely this evening. Unseasonably mild. Lows in the upper 50s. Southwest Winds 5 to 10 Mph. Gusts up to 30 Mph this evening. Chance of rain 70 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

    50.2 °F

  • Highest 4 April, 2026

    76.6 °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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