Arnold Weather Forecast

    • 38
    • 46

    Rain Showers

    • 28
    • 55

    Rain Showers

    • 29
    • 38

    Mostly Cloudy

    • 39
    • 51

    Mostly Cloudy

    • 28
    • 50

    Mostly Cloudy

    • 30
    • 39

    Chance Freezing Rain

Today 30 Jan Union

Mostly Sunny, then becoming partly cloudy this late morning and early Afternoon, then becoming mostly cloudy. Highs in the mid 40s. South Winds 5 to 10 Mph.

Tonight 30 Jan Union

Showers. Warmer with Lows in the upper 30s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 90 percent.

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Arnold Temperature Statistics

January Temperature

Marysville Union County Airport (7.5 miles)

  • Lowest 22 January, 2025

    -9 °F

  • Average January

    19.9 °F

  • Highest 18 January, 2025

    40.5 °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

    61.9 °F
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