Arnold Weather Forecast

    • 57
    • 86

    Mostly Sunny

    • 57
    • 88

    Mostly Sunny

    • 55
    • 85

    Partly Sunny

    • 56
    • 85

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

    • 58
    • 87

    Slight Chance Rain Showers

    • 56
    • 81

    Chance Rain Showers

Today 14 Sep Union

Sunny. Near steady Temperatures in the mid 80s. Northeast Winds 5 to 10 Mph.

Tonight 14 Sep Union

Clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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Arnold Temperature Statistics

September Temperature

Marysville Union County Airport (7.5 miles)

  • Lowest 9 September, 2025

    37.4 °F

  • Average September

    59.5 °F

  • Highest 3 September, 2025

    80.6 °F

Climate (2020–Present)

Marysville Union County Airport (7.5 miles)

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  • Average Low 2020–2025

    42.8 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    62 °F
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