Crystal Lake Weather Forecast

    • 64
    • 81

    Increasing Clouds

    • 69
    • 83

    Slight Chance Thunderstorms

    • 71
    • 90

    Mostly Sunny

    • 72
    • 93

    Mostly Sunny

    • 70
    • 91

    Chance Thunderstorms

    • 67
    • 87

    Chance Thunderstorms

Today 29 Jun Sullivan

Patchy fog in the morning. Mostly sunny. Very warm with Highs in the lower 80s. East Winds around 5 Mph, becoming south in the afternoon.

Tonight 29 Jun Sullivan

Partly cloudy. Patchy fog. Lows around 60. Light and variable Winds.

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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

    69.9 °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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