Big Sage Reservoir Weather Forecast

    • 42
    • 74

    Sunny

    • 46
    • 79

    Sunny

    • 48
    • 81

    Sunny

    • 52
    • 82

    Partly Sunny

    • 49
    • 74

    Mostly Cloudy

    • 47
    • 74

    Partly Sunny

    • 45
    • 72

    Mostly Sunny

Today 15 Sep Modoc County

Sunny. Highs in the lower 70s to lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 15 Sep Modoc County

Clear. Lows in the lower 40s to lower 50s. Northeast Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sage Reservoir Temperature Statistics

September Temperature

Alturas (9.3 miles)

  • Lowest 13 September, 2025

    41 °F

  • Average September

    66.5 °F

  • Highest 1 September, 2025

    91 °F

Climate (2020–Present)

Alturas (9.3 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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