South Mountain Reservoir Weather Forecast

    • 36
    • 53

    Rain Likely

    • 31
    • 49

    Partly Sunny

    • 34
    • 55

    Partly Sunny

    • 33
    • 46

    Rain/Snow Likely

    • 24
    • 42

    Chance Rain/Snow

    • 25
    • 41

    Partly Sunny

Today 13 Nov Modoc County

Mostly cloudy. Chance of rain this Morning, then rain likely this afternoon. Highs in the lower to mid 50s. Breezy. South Winds 15 to 25 Mph with Gusts to around 40 Mph. Chance of rain 70 percent.

Tonight 13 Nov Modoc County

Mostly cloudy with a 40 percent chance of rain. Snow level 7000 feet lowering to 6500 feet after midnight. Lows in the mid 30s to lower 40s. South Winds 10 to 20 Mph.

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South Mountain Reservoir Temperature Statistics

November Temperature

Alturas (22.4 miles)

  • Lowest 8 November, 2025

    28 °F

  • Average November

    50.6 °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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