Irwin Weather Forecast

    • 50
    • 71

    Chance Rain Showers

    • 41
    • 65

    Slight Chance Rain Showers

    • 38
    • 61

    Mostly Sunny

    • 53
    • 66

    Rain Showers Likely

    • 44
    • 69

    Chance Thunderstorms

    • 46
    • 64

    Partly Sunny

    • 53
    • 72

    Mostly Cloudy

Today 9 May Union

Mostly cloudy with a chance of Showers this Morning, then partly cloudy with a chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the lower 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 9 May Union

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms this Evening, then a chance of Showers after midnight. Lows around 50. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming west 5 to 10 Mph after Midnight, then becoming north late. Chance of rain 50 percent.

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Irwin Temperature Statistics

May Temperature

Marysville Union County Airport (9.9 miles)

  • Lowest 2 May, 2026

    33.8 °F

  • Average May

    50.8 °F

  • Highest 4 May, 2026

    75.2 °F

Climate (2021–Present)

Marysville Union County Airport (9.9 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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