Boulder Reservoir Weather Forecast

    • 53
    • 81

    Chance Rain Showers

    • 49
    • 78

    Mostly Sunny

    • 46
    • 76

    Partly Sunny

    • 44
    • 69

    Partly Sunny

    • 43
    • 62

    Chance Rain Showers

    • 43
    • 60

    Chance Rain Showers

Today 5 Sep Northern Washoe County

Sunny in the Morning, then partly cloudy with a slight chance of Showers and Thunderstorms in the afternoon. Patchy smoke in the afternoon. Highs 83 to 93. Light Winds becoming south around 10 Mph in the afternoon.

Tonight 5 Sep Northern Washoe County

Partly cloudy with a slight chance of Showers in the Evening, then clear after midnight. Lows 51 to 61. West 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 1 September, 2025

    50 °F

  • Average September

    76.2 °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

    64.5 °F
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