Boulder Reservoir Weather Forecast

    • 42
    • 64

    Mostly Sunny

    • 44
    • 68

    Mostly Sunny

    • 48
    • 71

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 47
    • 77

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

Today 19 May Northern Washoe County

Sunny. Highs 65 to 75. Light Winds becoming south around 10 Mph in the afternoon.

Tonight 19 May Northern Washoe County

Clear. Lows 39 to 49. West Winds around 10 Mph in the evening becoming light.

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Boulder Reservoir Temperature Statistics

May Temperature

Alturas (42.9 miles)

  • Lowest 14 May, 2026

    28.7 °F

  • Average May

    56.4 °F

  • Highest 12 May, 2026

    88.6 °F

Climate (2021–Present)

Alturas (42.9 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    64.9 °F
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