Crystal Lake Weather Forecast

    • 53
    • 54

    Rain Showers

    • 52
    • 72

    Chance Rain Showers

    • 57
    • 76

    Mostly Cloudy

    • 56
    • 79

    Slight Chance Thunderstorms

    • 49
    • 70

    Mostly Sunny

    • 47
    • 71

    Mostly Sunny

    • 49
    • 69

    Partly Sunny

Today 24 May Sullivan

Cloudy and not as cool. Near steady temperature in the mid 50s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 24 May Sullivan

A chance of Showers this Evening, then Showers after midnight. Not as cool. Near steady temperature in the mid 50s. South Winds around 5 Mph. Gusts up to 20 Mph this evening. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

May Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 12 May, 2026

    32.6 °F

  • Average May

    58.4 °F

  • Highest 18 May, 2026

    94.6 °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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