South Mountain Reservoir Weather Forecast

    • 49
    • 83

    Mostly Cloudy

    • 48
    • 82

    Sunny

    • 49
    • 83

    Sunny

    • 48
    • 84

    Sunny

    • 48
    • 83

    Mostly Sunny

    • 42
    • 76

    Mostly Sunny

Today 4 Oct Modoc County

Partly cloudy in the morning then becoming mostly cloudy. Highs in the lower to mid 80s. East Winds around 5 Mph shifting to the southwest in the afternoon.

Tonight 4 Oct Modoc County

Mostly cloudy. Lows in the lower to mid 50s. West Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

South Mountain Reservoir Temperature Statistics

October Temperature

Alturas (22.4 miles)

  • Lowest 1 October, 2026

    44.1 °F

  • Average October

    71.1 °F

  • Highest 1 October, 2026

    86 °F

Climate (2021–2026)

Alturas (22.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.1 °F

  • Average High 2021–2026

    64.7 °F
Get WillyWeather+ to remove ads