Jefferson Weather Forecast

    • 29
    • 62

    Mostly Sunny

    • 20
    • 44

    Breezy

    • 11
    • 33

    Mostly Cloudy

    • 5
    • 21

    Partly Sunny

    • 15
    • 27

    Partly Sunny

    • 23
    • 43

    Partly Sunny

Today 8 Dec Union

Mostly sunny. Highs around 60. Southeast Winds 5 to 10 Mph, becoming west 10 to 15 Mph this afternoon.

Tonight 8 Dec Union

Partly cloudy in the Evening, then becoming mostly clear. Lows in the upper 20s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Jefferson Temperature Statistics

December Temperature

Sioux City, Sioux Gateway Airport (16.2 miles)

  • Lowest 1 December, 2024

    5.8 °F

  • Average December

    22.9 °F

  • Highest 6 December, 2024

    46 °F

Climate (2019–Present)

Sioux City, Sioux Gateway Airport (16.2 miles)

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  • Average Low 2019–2024

    39 °F

  • Average 2019–2024

    50.6 °F

  • Average High 2019–2024

    62.3 °F
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