Irwin Weather Forecast

    • 52
    • 73

    Chance Thunderstorms

    • 53
    • 73

    Partly Sunny

    • 55
    • 76

    Mostly Sunny

    • 61
    • 79

    Slight Chance Thunderstorms

    • 61
    • 81

    Chance Thunderstorms

    • 59
    • 79

    Partly Sunny

Today 23 Aug Union

Mostly sunny until late Afternoon, then becoming partly cloudy. A chance of Showers and Thunderstorms this afternoon. Highs in the lower 70s. Northwest Winds 10 to 15 Mph. Chance of rain 30 percent.

Tonight 23 Aug Union

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then clear after midnight. Lows in the lower 50s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

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Irwin Temperature Statistics

August Temperature

Marysville Union County Airport (9.9 miles)

  • Lowest 4 August, 2026

    50 °F

  • Average August

    72.9 °F

  • Highest 6 August, 2026

    87.8 °F

Climate (2021–2026)

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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