Boulder Reservoir Weather Forecast

    • 43
    • 71

    Mostly Sunny

    • 47
    • 74

    Sunny

    • 49
    • 79

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

    • 51
    • 78

    Partly Sunny

    • 50
    • 78

    Partly Sunny

Today 29 Sep Northern Washoe County

Sunny. Highs 71 to 81. Light Winds becoming north around 10 Mph in the afternoon.

Tonight 29 Sep Northern Washoe County

Clear. Lows 41 to 51. Light Winds.

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Boulder Reservoir Temperature Statistics

September Temperature

Alturas (42.9 miles)

  • Lowest 14 September, 2026

    28.7 °F

  • Average September

    58 °F

  • Highest 24 September, 2026

    86.6 °F

Climate (2021–2026)

Alturas (42.9 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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