South Mountain Reservoir Weather Forecast

    • 32
    • 48

    Rain

    • 33
    • 45

    Mostly Cloudy

    • 30
    • 43

    Rain

    • 22
    • 39

    Chance Rain/Snow

    • 25
    • 39

    Mostly Cloudy

    • 22
    • 36

    Snow Likely

Today 13 Nov Modoc County

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 30s to lower 40s.

Tonight 13 Nov Modoc County

Mostly cloudy with a 30 percent chance of rain and snow. Snow level 5000 feet. Lows in the lower to mid 30s. Southwest Winds 10 to 15 Mph.

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South Mountain Reservoir Temperature Statistics

November Temperature

Alturas (22.4 miles)

  • Lowest 2 November, 2026

    20.6 °F

  • Average November

    44.4 °F

  • Highest 11 November, 2026

    71.1 °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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