Transportation Research Center of Ohio Airport Weather Forecast

    • 23
    • 44

    Becoming Sunny

    • 16
    • 31

    Mostly Sunny

    • 33
    • 41

    Chance Rain

    • 28
    • 51

    Mostly Cloudy

    • 42
    • 50

    Rain Likely

    • 47
    • 59

    Chance Rain

    • 37
    • 56

    Mostly Cloudy

Today 20 Dec Union

Mostly cloudy. Warmer with Highs in the mid 40s. Southwest Winds around 15 Mph with Gusts up to 30 Mph.

Tonight 20 Dec Union

Partly cloudy. Lows in the lower 20s. Southwest Winds around 10 Mph, becoming west after midnight. Gusts up to 25 Mph.

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Transportation Research Center of Ohio Airport Temperature Statistics

December Temperature

Marysville Union County Airport (11.2 miles)

  • Lowest 14 December, 2025

    2.3 °F

  • Average December

    25.3 °F

  • Highest 10 December, 2025

    39.4 °F

Climate (2020–Present)

Marysville Union County Airport (11.2 miles)

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  • Average Low 2020–2025

    42.8 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    62 °F
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