Grass Valley Reservoir Weather Forecast

    • 40
    • 63

    Mostly Sunny

    • 34
    • 61

    Mostly Sunny

    • 29
    • 48

    Chance Rain Showers

    • 33
    • 49

    Partly Sunny

    • 31
    • 47

    Chance Rain/Snow

    • 29
    • 46

    Chance Rain/Snow

Today 9 Oct Northern Washoe County

Partly cloudy in the morning then clearing. Highs 66 to 76. South Winds 10 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 9 Oct Northern Washoe County

Clear. Lows 37 to 47. Southwest Winds 10 to 15 Mph.

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Grass Valley Reservoir Temperature Statistics

October Temperature

Alturas (60.9 miles)

  • Lowest 6 October, 2025

    32 °F

  • Average October

    51.3 °F

  • Highest 7 October, 2025

    73 °F

Climate (2020–Present)

Alturas (60.9 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    49.1 °F

  • Average High 2020–2025

    64.3 °F
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