Union Grove State Park Weather Forecast

    • 34
    • 50

    Increasing Clouds

    • 41
    • 59

    Partly Sunny

    • 49
    • 71

    Partly Sunny

    • 30
    • 70

    Slight Chance Rain/Snow

    • 26
    • 46

    Mostly Sunny

    • 34
    • 54

    Partly Sunny

Today 23 Mar Tama

Sunny. Highs in the upper 40s. North Winds around 5 Mph, becoming east this afternoon.

Tonight 23 Mar Tama

Mostly cloudy. Lows in the mid 30s. South Winds 5 to 10 Mph.

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  • Temperature Real-Time

Union Grove State Park Temperature Statistics

March Temperature

Marshalltown, Marshalltown Municipal Airport (9.9 miles)

  • Lowest 17 March, 2026

    2.6 °F

  • Average March

    40.5 °F

  • Highest 21 March, 2026

    88 °F

Climate (2021–Present)

Marshalltown, Marshalltown Municipal Airport (9.9 miles)

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  • Average Low 2021–2026

    39.7 °F

  • Average 2021–2026

    50.4 °F

  • Average High 2021–2026

    61.2 °F
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