Transportation Research Center of Ohio Airport Weather Forecast

    • 58
    • 80

    Increasing Clouds

    • 68
    • 85

    Partly Sunny

    • 68
    • 88

    Mostly Cloudy

    • 56
    • 78

    Slight Chance Thunderstorms

    • 58
    • 79

    Partly Sunny

    • 63
    • 84

    Partly Sunny

Today 7 Sep Union

Mostly sunny in the Morning, then becoming partly cloudy. Highs around 80. Northeast Winds 5 to 10 Mph.

Tonight 7 Sep Union

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph.

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Transportation Research Center of Ohio Airport Temperature Statistics

September Temperature

Marysville Union County Airport (11.2 miles)

  • Lowest 2 September, 2026

    69.8 °F

  • Average September

    79.9 °F

  • Highest 1 September, 2026

    93.2 °F

Climate (2021–2026)

Marysville Union County Airport (11.2 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    62.6 °F
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