Flournoy Reservoir Weather Forecast

    • 45
    • 81

    Mostly Sunny

    • 37
    • 75

    Mostly Sunny

    • 46
    • 81

    Sunny

    • 48
    • 87

    Sunny

    • 44
    • 86

    Mostly Sunny

    • 46
    • 85

    Mostly Sunny

Today 13 Sep Modoc County

Sunny. Highs in the mid 70s to lower 80s. Southeast Winds around 5 Mph shifting to the southwest this afternoon.

Tonight 13 Sep Modoc County

Partly cloudy. Slight chance of Thunderstorms after midnight. Lows in the mid 40s to lower 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Flournoy Reservoir Temperature Statistics

September Temperature

Alturas (16.2 miles)

  • Lowest 11 September, 2025

    42.1 °F

  • Average September

    67.6 °F

  • Highest 1 September, 2025

    91 °F

Climate (2020–Present)

Alturas (16.2 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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