South Mountain Reservoir Weather Forecast

    • 53
    • 89

    Becoming Sunny

    • 53
    • 88

    Mostly Sunny

    • 54
    • 89

    Partly Sunny

    • 48
    • 80

    Chance Rain Showers

    • 47
    • 78

    Mostly Sunny

    • 48
    • 79

    Sunny

Today 16 Jun Modoc County

Sunny. Highs in the mid 80s to mid 90s. North Winds around 5 Mph shifting to the west this afternoon.

Tonight 16 Jun Modoc County

Clear. Lows in the mid 50s. Northwest Winds 10 to 15 Mph.

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  • Temperature Real-Time

South Mountain Reservoir Temperature Statistics

June Temperature

Alturas (22.4 miles)

  • Lowest 10 June, 2026

    33.7 °F

  • Average June

    61 °F

  • Highest 14 June, 2026

    90 °F

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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