Irwin Weather Forecast

    • 59
    • 76

    Chance Thunderstorms

    • 64
    • 85

    Becoming Sunny

    • 67
    • 88

    Mostly Sunny

    • 65
    • 89

    Rain Showers Likely

    • 49
    • 77

    Chance Rain Showers

    • 47
    • 66

    Mostly Cloudy

    • 53
    • 72

    Chance Rain Showers

Today 16 May Union

Mostly cloudy with a chance of Showers and Thunderstorms. Highs in the mid 70s. Southwest Winds around 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 16 May Union

Partly cloudy. A slight chance of Showers and Thunderstorms late this evening. Lows in the upper 50s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

May Temperature

Marysville Union County Airport (9.9 miles)

  • Lowest 2 May, 2026

    33.8 °F

  • Average May

    53.9 °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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