Union Grove Weather Forecast

    • 32
    • 36

    Rain

    • 10
    • 43

    Rain

    • 20
    • 28

    Partly Sunny

    • 16
    • 41

    Partly Sunny

    • 18
    • 29

    Partly Sunny

    • 28
    • 36

    Mostly Cloudy

Today 17 Dec Whiteside

Mostly sunny. Highs in the upper 30s. Northwest Winds around 5 Mph, becoming southeast this afternoon.

Tonight 17 Dec Whiteside

Mostly cloudy. Rain likely after midnight. Lows in the lower 30s. Temperature rising into the lower 40s after midnight. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 60 percent.

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Union Grove Temperature Statistics

December Temperature

Tri-Township Airport (14.9 miles)

  • Lowest 14 December, 2025

    -2.6 °F

  • Average December

    15.9 °F

  • Highest 10 December, 2025

    30.6 °F

Climate (2020–Present)

Tri-Township Airport (14.9 miles)

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  • Average Low 2020–2025

    41.3 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    61.2 °F
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