Transportation Research Center of Ohio Airport Weather Forecast

    • 74
    • 92

    Becoming Sunny

    • 75
    • 94

    Mostly Sunny

    • 71
    • 92

    Chance Thunderstorms

    • 66
    • 86

    Chance Thunderstorms

    • 60
    • 82

    Slight Chance Thunderstorms

    • 60
    • 80

    Partly Sunny

Today 1 Sep Union

Partly cloudy. Hot with Highs in the lower 90s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Heat index Values up to 102 in the afternoon.

Tonight 1 Sep Union

Partly cloudy in the Evening, then clearing. Muggy and Unseasonably warm. Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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Transportation Research Center of Ohio Airport Temperature Statistics

September Temperature

Marysville Union County Airport (11.2 miles)

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  • Average September

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Climate (2021–2026)

Marysville Union County Airport (11.2 miles)

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  • Average Low 2021–2026

    43 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    62.5 °F
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