Crystal Lake Weather Forecast

    • 61
    • 74

    Increasing Clouds

    • 63
    • 73

    Rain Showers

    • 54
    • 74

    Chance Thunderstorms

    • 54
    • 71

    Mostly Sunny

    • 58
    • 75

    Partly Sunny

    • 59
    • 77

    Partly Sunny

Today 20 Jul Sullivan

Sunny. Highs in the mid 70s. South Winds around 5 Mph.

Tonight 20 Jul Sullivan

Mostly clear. Lows in the lower 50s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

July Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 17 July, 2026

    60.1 °F

  • Average July

    79.6 °F

  • Highest 2 July, 2026

    100.7 °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

    53 °F

  • Average High 2021–2026

    63.3 °F
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