South Mountain Reservoir Weather Forecast

    • 47
    • 82

    Increasing Clouds

    • 47
    • 80

    Decreasing Clouds

    • 49
    • 83

    Mostly Sunny

    • 51
    • 84

    Partly Sunny

    • 48
    • 81

    Mostly Sunny

    • 47
    • 80

    Mostly Sunny

    • 48
    • 81

    Mostly Sunny

Today 1 Oct Modoc County

Sunny. Highs in the lower to mid 80s. East Winds 5 to 10 Mph shifting to the southwest this afternoon.

Tonight 1 Oct Modoc County

Mostly clear this evening then becoming partly cloudy. Lows in the mid 40s to lower 50s. West Winds 5 to 10 Mph shifting to the south after midnight.

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South Mountain Reservoir Temperature Statistics

October Temperature

Alturas (22.4 miles)

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  • Average October

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Climate (2021–2026)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.1 °F

  • Average High 2021–2026

    64.7 °F
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