South Mountain Reservoir Weather Forecast

    • 43
    • 70

    Mostly Sunny

    • 48
    • 76

    Increasing Clouds

    • 42
    • 72

    Mostly Sunny

    • 44
    • 72

    Sunny

    • 43
    • 75

    Mostly Sunny

    • 39
    • 67

    Mostly Sunny

    • 41
    • 66

    Mostly Sunny

Today 1 Jun Modoc County

Sunny. Highs in the lower to mid 70s. Northeast Winds 5 to 10 Mph shifting to the northwest late this afternoon.

Tonight 1 Jun Modoc County

Mostly clear. Lows in the mid 40s. North Winds 5 to 10 Mph shifting to the northeast well after midnight.

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South Mountain Reservoir Temperature Statistics

June Temperature

Alturas (22.4 miles)

  • Lowest

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  • Average June

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Climate (2021–Present)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    65 °F
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