South Mountain Reservoir Weather Forecast

    • 54
    • 89

    Thunderstorms

    • 51
    • 86

    Thunderstorms

    • 48
    • 81

    Slight Chance Thunderstorms

    • 47
    • 76

    Mostly Sunny

    • 50
    • 81

    Sunny

    • 53
    • 86

    Mostly Sunny

    • 55
    • 90

    Mostly Sunny

Today 1 Jul Modoc County

Partly cloudy until early afternoon then becoming mostly cloudy. Isolated Thunderstorms this Morning, then scattered Thunderstorms this afternoon. Highs in the mid 80s to lower 90s. North Winds 5 to 10 Mph. Chance of Thunderstorms 30 percent.

Tonight 1 Jul Modoc County

Mostly cloudy with scattered Thunderstorms early this Evening, then mostly cloudy with scattered Showers and isolated Thunderstorms late this evening. Partly cloudy after midnight. Lows in the lower to mid 50s. 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

July Temperature

Alturas (22.4 miles)

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  • Average July

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Climate (2020–Present)

Alturas (22.4 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    49.2 °F

  • Average High 2020–2025

    64.4 °F
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