South Mountain Reservoir Weather Forecast

    • 35
    • 66

    Increasing Clouds

    • 39
    • 63

    Mostly Cloudy

    • 31
    • 49

    Rain/Snow

    • 31
    • 43

    Chance Rain/Snow

    • 31
    • 45

    Rain/Snow

    • 25
    • 39

    Rain/Snow Likely

    • 25
    • 39

    Mostly Cloudy

Today 11 Nov Modoc County

Mostly cloudy. Snow likely in the Morning, then rain and snow likely in the afternoon. Highs in the mid 30s to lower 40s.

Tonight 11 Nov Modoc County

Mostly clear. Lows in the mid 30s to lower 40s. Southeast Winds 10 to 15 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

    44.2 °F

  • Highest 7 November, 2026

    70.6 °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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