South Mountain Reservoir Weather Forecast

    • 21
    • 48

    Rain

    • 23
    • 43

    Becoming Sunny

    • 30
    • 53

    Partly Sunny

    • 38
    • 62

    Partly Sunny

    • 38
    • 63

    Chance Rain/Snow

    • 35
    • 60

    Chance Rain/Snow

    • 35
    • 56

    Chance Rain/Snow

Today 15 Apr Modoc County

Mostly cloudy with a 40 percent chance of rain. Snow level 6000 feet. Highs in the mid 40s to lower 50s. Windy. Southwest Winds 20 to 30 Mph with Gusts to around 45 Mph.

Tonight 15 Apr Modoc County

Mostly cloudy with rain and snow likely early this Evening, then mostly cloudy with a slight chance of snow late this evening. Mostly clear after midnight. Snow level 2500 feet this evening. Little or no snow accumulation except snow accumulation of 2 to 4 Inches in the warner Mountains. Lows in the lower to mid 20s. Breezy. West Winds 15 to 25 Mph with Gusts to around 40 Mph shifting to the northwest 10 to 15 Mph after midnight. Chance of precipitation 60 percent.

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South Mountain Reservoir Temperature Statistics

April Temperature

Alturas (22.4 miles)

  • Lowest 3 April, 2026

    17.7 °F

  • Average April

    45.6 °F

  • Highest 5 April, 2026

    73.7 °F

Climate (2021–Present)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.7 °F

  • Average High 2021–2026

    64.9 °F
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