Crystal Lake Weather Forecast

    • 38
    • 63

    Increasing Clouds

    • 32
    • 56

    Partly Sunny

    • 44
    • 58

    Rain Showers

    • 45
    • 56

    Rain Showers

    • 43
    • 57

    Chance Rain Showers

    • 47
    • 63

    Partly Sunny

    • 50
    • 68

    Slight Chance Rain Showers

Today 10 May Sullivan

Mostly sunny and not as cool. Near steady temperature in the lower 60s. West Winds around 5 Mph.

Tonight 10 May Sullivan

Mostly clear this Evening, then becoming mostly cloudy. Lows in the upper 30s. North Winds 5 to 10 Mph.

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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

    53.6 °F

  • Highest 5 May, 2026

    81.6 °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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