Boulder Reservoir Weather Forecast

    • 44
    • 71

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 51
    • 81

    Mostly Sunny

    • 54
    • 81

    Partly Sunny

    • 50
    • 76

    Mostly Cloudy

    • 48
    • 73

    Partly Sunny

    • 48
    • 74

    Mostly Sunny

Today 15 Sep Northern Washoe County

Sunny. Highs 74 to 84. Northeast Winds 10 to 15 Mph.

Tonight 15 Sep Northern Washoe County

Clear. Lows 42 to 52. Northeast Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boulder Reservoir Temperature Statistics

September Temperature

Alturas (42.9 miles)

  • Lowest 13 September, 2025

    41 °F
  • Average September

    66.5 °F
  • Highest 1 September, 2025

    91 °F

Climate (2020–Present)

Alturas (42.9 miles)

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  • Average Low 2020–2025

    32.9 °F
  • Average 2020–2025

    49.2 °F
  • Average High 2020–2025

    64.4 °F
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