Arnold Weather Forecast

    • 62
    • 85

    Chance Thunderstorms

    • 68
    • 85

    Mostly Sunny

    • 70
    • 87

    Chance Thunderstorms

    • 67
    • 85

    Rain Showers

    • 64
    • 82

    Rain Showers Likely

    • 61
    • 80

    Chance Thunderstorms

Today 8 Aug Union

Partly cloudy. Patchy fog this morning. A chance of Showers and Thunderstorms this afternoon. Highs in the mid 80s. Southwest Winds 10 to 15 Mph. Chance of rain 40 percent.

Tonight 8 Aug Union

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the lower 60s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Arnold Temperature Statistics

August Temperature

Marysville Union County Airport (7.5 miles)

  • Lowest 4 August, 2026

    50 °F

  • Average August

    71.6 °F

  • Highest 6 August, 2026

    87.8 °F

Climate (2021–2026)

Marysville Union County Airport (7.5 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    62.6 °F
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