South Mountain Reservoir Weather Forecast

    • 43
    • 53

    Rain Showers

    • 36
    • 58

    Slight Chance Rain Showers

    • 40
    • 64

    Mostly Sunny

    • 35
    • 62

    Chance Rain

    • 38
    • 65

    Mostly Sunny

    • 42
    • 72

    Partly Sunny

Today 3 Sep Modoc County

Chance of rain Showers early this Morning, then rain Showers in the late morning and afternoon. Slight chance of Thunderstorms this afternoon. Highs in the lower to mid 50s. Southwest Winds 10 to 20 Mph. Chance of precipitation 90 percent.

Tonight 3 Sep Modoc County

Mostly cloudy. Chance of rain Showers and slight chance of Thunderstorms in the Evening, then chance of rain Showers after midnight. Snow level 7000 feet after midnight. Lows in the lower to mid 40s. West Winds 10 to 15 Mph shifting to the northwest around 5 Mph well after midnight. Chance of precipitation 40 percent.

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South Mountain Reservoir Temperature Statistics

September Temperature

Alturas (22.4 miles)

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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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