Grass Valley Reservoir Weather Forecast

    • 47
    • 77

    Mostly Sunny

    • 52
    • 79

    Sunny

    • 54
    • 86

    Sunny

    • 50
    • 85

    Sunny

    • 39
    • 77

    Breezy

    • 35
    • 60

    Mostly Sunny

Today 16 Jun Northern Washoe County

Sunny in the morning then becoming partly cloudy. Highs 80 to 90. Southwest Winds 10 to 20 Mph. Gusts up to 35 Mph in the afternoon.

Tonight 16 Jun Northern Washoe County

Clear. Lows 45 to 55. West Winds 15 to 25 Mph with Gusts up to 35 Mph becoming northwest around 10 Mph after midnight.

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Grass Valley Reservoir Temperature Statistics

June Temperature

Alturas (60.9 miles)

  • Lowest 2 June, 2025

    38.6 °F

  • Average June

    65.7 °F

  • Highest 8 June, 2025

    94.6 °F

Climate (2020–Present)

Alturas (60.9 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    64.4 °F
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