Union Weather Forecast

    • 61
    • 79

    Chance Thunderstorms

    • 58
    • 77

    Chance Thunderstorms

    • 58
    • 77

    Slight Chance Thunderstorms

    • 61
    • 80

    Chance Rain Showers

    • 61
    • 81

    Slight Chance Thunderstorms

    • 57
    • 82

    Slight Chance Thunderstorms

    • 55
    • 79

    Mostly Sunny

Today 17 Sep Cass

Mostly cloudy with a chance of Showers and Thunderstorms. Not as warm. Near steady temperature in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 17 Sep Cass

A chance of Thunderstorms this evening. Mostly cloudy with a chance of Showers. Lows around 60. South Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Temperature Statistics

September Temperature

Plattsmouth, Plattsmouth Municipal Airport (9.3 miles)

  • Lowest 6 September, 2025

    45.5 °F

  • Average September

    67.9 °F

  • Highest 13 September, 2025

    94.3 °F

Climate (2020–Present)

Plattsmouth, Plattsmouth Municipal Airport (9.3 miles)

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  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    63.8 °F
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