South Mountain Reservoir Weather Forecast

    • 50
    • 82

    Mostly Sunny

    • 53
    • 86

    Mostly Sunny

    • 54
    • 88

    Partly Sunny

    • 53
    • 86

    Mostly Sunny

    • 52
    • 86

    Mostly Sunny

    • 52
    • 85

    Mostly Sunny

Today 3 Jul Modoc County

Sunny. Highs in the lower to mid 80s. North Winds around 5 Mph shifting to the northeast late in the Morning, then shifting to the west in the afternoon.

Tonight 3 Jul Modoc County

Mostly clear. Lows in the lower to mid 50s. West Winds 10 to 15 Mph shifting to the northwest around 5 Mph well after midnight.

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South Mountain Reservoir Temperature Statistics

July Temperature

Alturas (22.4 miles)

  • Lowest

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  • Average July

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Climate (2021–2026)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    64.8 °F
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