Crystal Lake Weather Forecast

    • 49
    • 56

    Chance Rain Showers

    • 50
    • 65

    Chance Rain Showers

    • 54
    • 66

    Mostly Cloudy

    • 52
    • 66

    Rain Showers

    • 45
    • 61

    Rain Showers Likely

    • 38
    • 55

    Chance Rain Showers

Today 30 Oct Dakota

Cloudy. A slight chance of Showers in the Morning, then a chance of Showers in the afternoon. Cooler with Highs in the mid 50s. East Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 30 Oct Dakota

Cloudy. Showers Likely, mainly in the evening. Patchy fog. Lows in the upper 40s. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

October Temperature

Sioux City, Sioux Gateway Airport (5 miles)

  • Lowest 17 October, 2026

    27.6 °F

  • Average October

    60.2 °F

  • Highest 10 October, 2026

    93.7 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (5 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    63.5 °F
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