South Mountain Reservoir Weather Forecast

    • 50
    • 85

    Areas Smoke

    • 52
    • 85

    Sunny

    • 52
    • 88

    Sunny

    • 52
    • 89

    Sunny

    • 53
    • 90

    Sunny

    • 51
    • 89

    Sunny

Today 27 Jul Modoc County

Sunny. Smoke in the morning. Highs in the lower to mid 80s. Light Winds becoming southwest 5 to 10 Mph in the late morning and afternoon.

Tonight 27 Jul Modoc County

Clear. Lows around 50. West Winds around 5 Mph shifting to the east well after midnight.

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  • Temperature Real-Time

South Mountain Reservoir Temperature Statistics

July Temperature

Alturas (22.4 miles)

  • Lowest 1 July, 2026

    38.6 °F

  • Average July

    70.2 °F

  • Highest 24 July, 2026

    96.1 °F

Climate (2021–2026)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    49.3 °F

  • Average High 2021–2026

    64.7 °F
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