Arnold Weather Forecast

    • 57
    • 81

    Rain Showers Likely

    • 56
    • 67

    Rain Showers Likely

    • 57
    • 75

    Mostly Sunny

    • 60
    • 78

    Mostly Sunny

    • 62
    • 83

    Mostly Sunny

    • 57
    • 78

    Chance Rain Showers

Today 18 Sep West Slope Northern Sierra Nevada

Mostly cloudy. At higher Elevations, a slight chance of rain Showers late in the afternoon. Highs 66 to 81 higher Elevations. 77 to 89 lower Elevations. Prevailing east Winds up to 10 Mph shifting to the southwest in the afternoon.

Tonight 18 Sep West Slope Northern Sierra Nevada

Cloudy with a chance of rain Showers. Cooler. Lows 42 to 57 higher Elevations. 51 to 63 lower Elevations. Light Winds.

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Arnold Temperature Statistics

September Temperature

COLUMBIA (15.5 miles)

  • Lowest 10 September, 2025

    51.8 °F

  • Average September

    70.9 °F

  • Highest 1 September, 2025

    100.4 °F

Climate (2020–Present)

COLUMBIA (15.5 miles)

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  • Average Low 2020–2025

    46.6 °F

  • Average 2020–2025

    59.8 °F

  • Average High 2020–2025

    73.7 °F
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