Donovan Reservoir Weather Forecast

    • 40
    • 75

    Slight Chance Thunderstorms

    • 39
    • 71

    Slight Chance Thunderstorms

    • 40
    • 75

    Mostly Sunny

    • 43
    • 80

    Mostly Sunny

    • 44
    • 82

    Partly Sunny

    • 43
    • 82

    Mostly Sunny

Today 16 Sep Modoc County

Sunny late this Morning, then partly cloudy with a 10 percent chance of Thunderstorms this afternoon. Highs in the mid 60s to mid 70s. East Winds 5 to 10 Mph.

Tonight 16 Sep Modoc County

Partly cloudy with a slight chance of Thunderstorms in the Evening, then mostly cloudy with a slight chance of rain after midnight. Lows in the lower to mid 40s. Southwest Winds 5 to 10 Mph. Chance of precipitation 10 percent.

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Donovan Reservoir Temperature Statistics

September Temperature

Alturas (8.1 miles)

  • Lowest 14 September, 2026

    32 °F

  • Average September

    59.9 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Alturas (8.1 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.1 °F

  • Average High 2021–2026

    64.6 °F
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