Crystal Lake Weather Forecast

    • 45
    • 63

    Rain

    • 27
    • 64

    Rain

    • 34
    • 52

    Mostly Sunny

    • 42
    • 70

    Mostly Sunny

    • 38
    • 73

    Mostly Sunny

    • 20
    • 56

    Chance Rain/Snow

Today 5 Mar Dakota

Partly sunny. Highs in the lower 60s. Southeast Winds 15 to 20 Mph.

Tonight 5 Mar Dakota

Mostly cloudy. Lows in the lower 30s. Southeast Winds around 5 Mph.

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  • Temperature Real-Time

Crystal Lake Temperature Statistics

March Temperature

Sioux City, Sioux Gateway Airport (5 miles)

  • Lowest 1 March, 2026

    10 °F

  • Average March

    28.7 °F

  • Highest 2 March, 2026

    45 °F

Climate (2021–Present)

Sioux City, Sioux Gateway Airport (5 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    63.2 °F
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