South Mountain Reservoir Weather Forecast

    • 30
    • 45

    Increasing Clouds

    • 31
    • 44

    Rain/Snow Likely

    • 28
    • 44

    Rain/Snow Likely

    • 24
    • 45

    Partly Sunny

    • 29
    • 47

    Chance Snow

    • 27
    • 42

    Snow Likely

Today 9 Feb Modoc County

Partly cloudy then becoming sunny early this afternoon then becoming partly cloudy. Patchy fog early this morning. Highs in the lower 40s to lower 50s. North Winds 5 to 10 Mph shifting to the northeast in the late morning and afternoon.

Tonight 9 Feb Modoc County

Mostly cloudy. Slight chance of snow after midnight. Lows around 30. East Winds 10 to 15 Mph.

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  • Temperature Real-Time

South Mountain Reservoir Temperature Statistics

February Temperature

Alturas (22.4 miles)

  • Lowest 2 February, 2026

    18.6 °F

  • Average February

    43.9 °F

  • Highest 4 February, 2026

    67.6 °F

Climate (2021–Present)

Alturas (22.4 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    64.7 °F
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