South Mountain Reservoir Weather Forecast

    • 44
    • 57

    Rain

    • 38
    • 54

    Rain

    • 35
    • 58

    Chance Rain

    • 37
    • 65

    Mostly Sunny

    • 37
    • 66

    Chance Rain

    • 39
    • 65

    Partly Sunny

Today 2 Sep Modoc County

Mostly cloudy. A 30 percent chance of rain in the late morning and afternoon. Highs in the mid 50s to lower 60s. Breezy. South Winds 10 to 15 Mph shifting to the southwest 15 to 25 Mph in the late morning and afternoon.

Tonight 2 Sep Modoc County

Mostly cloudy. Chance of rain in the Evening, then rain likely after midnight. Lows in the lower to mid 40s. Southwest Winds 10 to 20 Mph. Chance of rain 70 percent.

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South Mountain Reservoir Temperature Statistics

September Temperature

Alturas (22.4 miles)

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  • Average September

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Climate (2021–2026)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    64.8 °F
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