Union Weather Forecast

    • -6
    • 16

    Partly Sunny

    • -5
    • 4

    Cold

    • -12
    • 6

    Cold

    • 0
    • 10

    Cold

    • 14
    • 29

    Mostly Cloudy

    • 10
    • 26

    Mostly Cloudy

Today 18 Jan Hardin

Mostly sunny. Much cooler with Highs around 15. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 18 Jan Hardin

Partly cloudy. Cold with Lows around 7 below. Northwest Winds around 15 Mph with Gusts up to 30 Mph. Wind chill Values as low as 28 below.

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Union Temperature Statistics

January Temperature

Marshalltown, Marshalltown Municipal Airport (11.8 miles)

  • Lowest 14 January, 2025

    -7.1 °F

  • Average January

    16.5 °F

  • Highest 11 January, 2025

    33.1 °F

Climate (2020–Present)

Marshalltown, Marshalltown Municipal Airport (11.8 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    49.8 °F

  • Average High 2020–2025

    60.3 °F
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