Crystal Lake Weather Forecast

    • 56
    • 66

    Rain Showers

    • 53
    • 72

    Partly Sunny

    • 55
    • 75

    Mostly Sunny

    • 60
    • 77

    Rain Showers

    • 56
    • 76

    Chance Thunderstorms

    • 57
    • 76

    Slight Chance Thunderstorms

Today 22 Jun Sullivan

Showers. A slight chance of Thunderstorms in the afternoon. Highs in the upper 60s. Southeast Winds around 5 Mph with Gusts up to 20 Mph. Chance of rain near 100 percent.

Tonight 22 Jun Sullivan

Showers Likely, mainly in the evening. Lows in the mid 50s. South Winds around 5 Mph, becoming north with Gusts up to 20 Mph after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

June Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 1 June, 2026

    45.6 °F

  • Average June

    70 °F

  • Highest 11 June, 2026

    92.6 °F

Climate (2021–2026)

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

    63.3 °F
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