Irwin Weather Forecast

    • 43
    • 71

    Mostly Cloudy

    • 47
    • 69

    Decreasing Clouds

    • 60
    • 80

    Rain Showers

    • 51
    • 75

    Chance Thunderstorms

    • 40
    • 65

    Partly Sunny

    • 38
    • 61

    Partly Sunny

    • 37
    • 58

    Slight Chance Rain Showers

Today 25 Apr Union

Mostly cloudy. Cooler with Highs in the upper 60s. North Winds 5 to 10 Mph.

Tonight 25 Apr Union

Partly cloudy this Evening, then becoming mostly cloudy. Cooler with Lows in the lower 40s. Northeast Winds 10 to 15 Mph.

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Irwin Temperature Statistics

April Temperature

Marysville Union County Airport (9.9 miles)

  • Lowest 8 April, 2026

    26.6 °F

  • Average April

    57.4 °F

  • Highest 15 April, 2026

    82.4 °F

Climate (2021–Present)

Marysville Union County Airport (9.9 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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