Crystal Lake Weather Forecast

    • 54
    • 61

    Mostly Cloudy

    • 50
    • 66

    Partly Sunny

    • 55
    • 70

    Partly Sunny

    • 56
    • 73

    Partly Sunny

    • 48
    • 68

    Chance Rain Showers

    • 47
    • 63

    Chance Rain Showers

Today 28 Sep Sullivan

Cloudy. A chance of light rain and drizzle this Morning, then isolated Showers this afternoon. Highs in the lower 60s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 28 Sep Sullivan

Cloudy. Patchy fog after midnight. Lows in the lower 50s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

September Temperature

Williamsport - Lycoming County Airport (14.3 miles)

  • Lowest 24 September, 2026

    41.6 °F

  • Average September

    67.9 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

Williamsport - Lycoming County Airport (14.3 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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