South Mountain Reservoir Weather Forecast

    • 31
    • 49

    Mostly Cloudy

    • 32
    • 50

    Mostly Cloudy

    • 30
    • 51

    Mostly Sunny

    • 32
    • 56

    Partly Sunny

    • 35
    • 62

    Partly Sunny

    • 35
    • 60

    Mostly Cloudy

Today 3 Nov Modoc County

Mostly cloudy. A 30 percent chance of rain this afternoon. Snow level 6500 feet this afternoon. Highs in the mid 40s to lower 50s. Southwest Winds 5 to 10 Mph.

Tonight 3 Nov Modoc County

Mostly cloudy. Lows around 30. Southwest Winds around 5 Mph in the evening becoming light.

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South Mountain Reservoir Temperature Statistics

November Temperature

Alturas (22.4 miles)

  • Lowest 1 November, 2026

    24.1 °F

  • Average November

    35.6 °F

  • Highest 1 November, 2026

    48 °F

Climate (2021–2026)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    64.9 °F
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