Union Weather Forecast

    • 30
    • 44

    Mostly Cloudy

    • 36
    • 48

    Chance Rain

    • 43
    • 58

    Rain

    • 37
    • 67

    Rain

    • 33
    • 51

    Mostly Sunny

    • 37
    • 62

    Mostly Sunny

Today 3 Mar Hardin

Mostly cloudy. Highs in the lower 40s. East Winds around 5 Mph.

Tonight 3 Mar Hardin

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

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Union Temperature Statistics

March Temperature

Marshalltown, Marshalltown Municipal Airport (11.8 miles)

  • Lowest 1 March, 2026

    17.1 °F

  • Average March

    24.9 °F

  • Highest 1 March, 2026

    30.9 °F

Climate (2021–Present)

Marshalltown, Marshalltown Municipal Airport (11.8 miles)

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  • Average Low 2021–2026

    39.7 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.2 °F
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