West Valley Reservoir Weather Forecast

    • 45
    • 79

    Increasing Clouds

    • 46
    • 80

    Mostly Cloudy

    • 45
    • 79

    Mostly Sunny

    • 44
    • 80

    Partly Sunny

    • 46
    • 81

    Partly Sunny

    • 41
    • 76

    Partly Sunny

Today 20 Sep Modoc County

Partly cloudy then becoming sunny late this morning then becoming partly cloudy. Highs in the mid 70s to lower 80s. East Winds around 5 Mph.

Tonight 20 Sep Modoc County

Partly cloudy. Lows in the mid 40s to lower 50s. East Winds around 5 Mph.

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West Valley Reservoir Temperature Statistics

September Temperature

Alturas (21.1 miles)

  • Lowest 14 September, 2026

    28.7 °F

  • Average September

    58 °F

  • Highest 10 September, 2026

    85.6 °F

Climate (2021–2026)

Alturas (21.1 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    49.1 °F

  • Average High 2021–2026

    64.7 °F
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