Crystal Lake Weather Forecast

    • 64
    • 85

    Slight Chance Thunderstorms

    • 63
    • 83

    Thunderstorms Likely

    • 62
    • 84

    Mostly Sunny

    • 66
    • 86

    Slight Chance Thunderstorms

    • 66
    • 86

    Rain Showers Likely

    • 58
    • 81

    Chance Rain Showers

    • 59
    • 80

    Mostly Sunny

Today 6 Jul Dakota

Sunny. Near steady temperature in the lower 80s. North Winds around 5 Mph.

Tonight 6 Jul Dakota

Mostly clear this Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal Lake Temperature Statistics

July Temperature

Sioux City, Sioux Gateway Airport (5 miles)

  • Lowest 1 July, 2025

    59 °F

  • Average July

    78 °F

  • Highest 3 July, 2025

    93 °F

Climate (2020–Present)

Sioux City, Sioux Gateway Airport (5 miles)

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  • Average Low 2020–2025

    38.7 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    62.6 °F
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