Crystal Lake Weather Forecast

    • 58
    • 77

    Chance Thunderstorms

    • 55
    • 81

    Slight Chance Thunderstorms

    • 55
    • 80

    Partly Sunny

    • 58
    • 81

    Chance Thunderstorms

    • 59
    • 81

    Rain Showers Likely

    • 60
    • 82

    Chance Thunderstorms

Today 31 May Hancock

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the upper 70s. Southeast Winds 15 to 20 Mph. Chance of rain 50 percent.

Tonight 31 May Hancock

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the upper 50s. East Winds 10 to 15 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

May Temperature

Forest City Municipal Airport (8.1 miles)

  • Lowest 2 May, 2026

    28.4 °F

  • Average May

    58.4 °F

  • Highest 15 May, 2026

    86 °F

Climate (2021–Present)

Forest City Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    36.6 °F

  • Average 2021–2026

    47.3 °F

  • Average High 2021–2026

    57.4 °F
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