Crystal Lake Weather Forecast

    • 47
    • 55

    Rain Showers Likely

    • 42
    • 59

    Partly Sunny

    • 47
    • 65

    Partly Sunny

    • 50
    • 62

    Chance Rain Showers

    • 53
    • 66

    Chance Rain Showers

    • 55
    • 63

    Chance Rain Showers

Today 21 Sep Hancock

Showers likely. Patchy fog. A slight chance of Thunderstorms this afternoon. Highs in the mid 50s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 21 Sep Hancock

Mostly cloudy. A chance of drizzle in the evening. Patchy fog in the evening. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

September Temperature

Forest City Municipal Airport (8.1 miles)

  • Lowest 13 September, 2026

    44.6 °F

  • Average September

    67.3 °F

  • Highest 4 September, 2026

    89.6 °F

Climate (2021–2026)

Forest City Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    36.6 °F

  • Average 2021–2026

    47.1 °F

  • Average High 2021–2026

    57.3 °F
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