Transportation Research Center of Ohio Airport Weather Forecast

    • 56
    • 76

    Mostly Cloudy

    • 63
    • 80

    Chance Rain Showers

    • 59
    • 79

    Chance Thunderstorms

    • 49
    • 76

    Mostly Sunny

    • 51
    • 72

    Partly Sunny

    • 51
    • 74

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

Today 25 May Union

Partly cloudy. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 25 May Union

Partly cloudy. Lows in the mid 50s. Northeast Winds around 5 Mph until early Morning, becoming light and variable.

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Transportation Research Center of Ohio Airport Temperature Statistics

May Temperature

Marysville Union County Airport (11.2 miles)

  • Lowest 2 May, 2026

    33.8 °F

  • Average May

    58.1 °F

  • Highest 18 May, 2026

    89.6 °F

Climate (2021–Present)

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

    62.5 °F
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