West Valley Reservoir Weather Forecast

    • 33
    • 52

    Mostly Cloudy

    • 33
    • 57

    Mostly Cloudy

    • 35
    • 58

    Mostly Cloudy

    • 28
    • 54

    Mostly Cloudy

    • 28
    • 52

    Mostly Sunny

    • 30
    • 58

    Mostly Sunny

Today 29 Jan Modoc County

Mostly cloudy. Highs in the lower to mid 50s. South Winds around 5 Mph shifting to the southwest late this afternoon.

Tonight 29 Jan Modoc County

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 30s. Southeast Winds around 5 Mph.

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West Valley Reservoir Temperature Statistics

January Temperature

Alturas (21.1 miles)

  • Lowest 9 January, 2026

    4.6 °F

  • Average January

    36.3 °F

  • Highest 14 January, 2026

    60.7 °F

Climate (2021–Present)

Alturas (21.1 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    64.6 °F
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