South Mountain Reservoir Weather Forecast

    • 34
    • 45

    Mostly Cloudy

    • 33
    • 44

    Rain Likely

    • 22
    • 41

    Chance Rain/Snow

    • 28
    • 40

    Snow

    • 24
    • 38

    Snow

    • 22
    • 37

    Chance Snow

    • 19
    • 37

    Mostly Cloudy

Today 14 Nov Modoc County

Mostly cloudy. Slight chance of snow in the Morning, then chance of rain and snow in the afternoon. Highs in the mid 30s to mid 40s.

Tonight 14 Nov Modoc County

Mostly cloudy. A 30 percent chance of rain well after midnight. Snow level 6000 feet. Lows in the mid 30s. South Winds 10 to 20 Mph with Gusts to around 40 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Mountain Reservoir Temperature Statistics

November Temperature

Alturas (22.4 miles)

  • Lowest 2 November, 2026

    20.6 °F

  • Average November

    45.1 °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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