South Mountain Reservoir Weather Forecast

    • 50
    • 88

    Becoming Sunny

    • 50
    • 84

    Sunny

    • 51
    • 85

    Sunny

    • 54
    • 91

    Sunny

    • 54
    • 92

    Sunny

    • 53
    • 90

    Sunny

Today 1 Aug Modoc County

Partly cloudy this morning then becoming sunny. Highs in the mid 80s to mid 90s. South Winds around 5 Mph shifting to the west 10 to 15 Mph in the late morning and afternoon.

Tonight 1 Aug Modoc County

Mostly clear. Lows in the lower to mid 50s. Northwest Winds 15 to 20 Mph decreasing to 5 to 10 Mph after midnight.

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South Mountain Reservoir Temperature Statistics

August Temperature

Alturas (22.4 miles)

  • Lowest

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  • Average August

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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

    49.3 °F

  • Average High 2021–2026

    64.8 °F
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