Grass Valley Reservoir Weather Forecast

    • 32
    • 65

    Increasing Clouds

    • 27
    • 46

    Chance Rain/Snow

    • 27
    • 46

    Mostly Cloudy

    • 32
    • 56

    Mostly Sunny

    • 36
    • 62

    Mostly Sunny

    • 37
    • 63

    Mostly Sunny

    • 39
    • 64

    Mostly Sunny

Today 10 Oct Northern Washoe County

Sunny. Highs 69 to 79.

Tonight 10 Oct Northern Washoe County

Partly cloudy. Patchy blowing dust in the evening. Lows 29 to 39. North Winds 10 to 20 Mph with Gusts up to 40 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Valley Reservoir Temperature Statistics

October Temperature

Alturas (60.9 miles)

  • Lowest 1 October, 2026

    34.6 °F

  • Average October

    64.9 °F

  • Highest 3 October, 2026

    89.7 °F

Climate (2021–2026)

Alturas (60.9 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    64.8 °F
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