South Mountain Reservoir Weather Forecast

    • 36
    • 46

    Rain

    • 31
    • 45

    Rain Likely

    • 27
    • 45

    Mostly Cloudy

    • 29
    • 45

    Chance Rain/Snow

    • 26
    • 42

    Chance Snow

    • 28
    • 46

    Partly Sunny

Today 16 Nov Modoc County

Rain this Morning, then chance of rain early this afternoon. Rain likely late this afternoon. Highs in the mid 40s to lower 50s. Southwest Winds 10 to 20 Mph. Chance of rain 90 percent.

Tonight 16 Nov Modoc County

Cloudy. Chance of rain in the Evening, then rain and snow after midnight. Snow level 6500 feet lowering to 6000 feet after midnight. No snow accumulation. Lows in the mid 30s to lower 40s. South Winds 10 to 15 Mph. Chance of precipitation 80 percent.

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South Mountain Reservoir Temperature Statistics

November Temperature

Alturas (22.4 miles)

  • Lowest 8 November, 2025

    28 °F

  • Average November

    49.3 °F

  • Highest 1 November, 2025

    69.1 °F

Climate (2020–Present)

Alturas (22.4 miles)

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  • Average Low 2020–2025

    33.2 °F

  • Average 2020–2025

    49.2 °F

  • Average High 2020–2025

    64.3 °F
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