Union Weather Forecast

    • 67
    • 85

    Chance Thunderstorms

    • 64
    • 82

    Rain Showers

    • 59
    • 79

    Rain Showers Likely

    • 65
    • 86

    Chance Rain Showers

    • 75
    • 89

    Slight Chance Thunderstorms

    • 75
    • 94

    Mostly Sunny

    • 73
    • 92

    Slight Chance Thunderstorms

Today 16 Jun Hardin

Mostly sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 80s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 16 Jun Hardin

Mostly cloudy with a chance of Thunderstorms. A chance of Showers. Lows in the mid 60s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Temperature Statistics

June Temperature

Marshalltown, Marshalltown Municipal Airport (11.8 miles)

  • Lowest 10 June, 2025

    46.7 °F

  • Average June

    68.3 °F

  • Highest 11 June, 2025

    93.7 °F

Climate (2020–Present)

Marshalltown, Marshalltown Municipal Airport (11.8 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    49.9 °F

  • Average High 2020–2025

    60.6 °F
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