Boulder Reservoir Weather Forecast

    • 36
    • 62

    Becoming Sunny

    • 43
    • 67

    Mostly Sunny

    • 46
    • 75

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 49
    • 76

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

Today 13 Sep Northern Washoe County

Sunny. Highs 69 to 79. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 13 Sep Northern Washoe County

Clear. Lows 37 to 47. North Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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Boulder Reservoir Temperature Statistics

September Temperature

Alturas (42.9 miles)

  • Lowest 10 September, 2026

    60.1 °F

  • Average September

    74.6 °F

  • Highest 10 September, 2026

    82.9 °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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