Crystal Lake Weather Forecast

    • 37
    • 54

    Chance Rain Showers

    • 42
    • 54

    Chance Rain

    • 45
    • 55

    Rain

    • 40
    • 61

    Rain Showers Likely

    • 36
    • 54

    Mostly Sunny

    • 39
    • 54

    Chance Rain Showers

Today 7 May Sullivan

Mostly cloudy. Near steady temperature in the mid 50s. Northwest Winds around 5 Mph.

Tonight 7 May Sullivan

Mostly cloudy with a chance of rain Showers this Evening, then partly cloudy after midnight. Areas of frost after midnight. Lows in the mid 30s. Northwest Winds around 5 Mph. Chance of rain 40 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 4 May, 2026

    34.6 °F

  • Average May

    54 °F

  • Highest 5 May, 2026

    81 °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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