Boulder Reservoir Weather Forecast

    • 44
    • 69

    Partly Sunny

    • 46
    • 71

    Mostly Sunny

    • 50
    • 74

    Mostly Sunny

    • 47
    • 76

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

    • 38
    • 75

    Breezy

Today 20 May Northern Washoe County

Partly cloudy in the morning then clearing. Highs 72 to 82. Light Winds becoming west around 10 Mph in the afternoon.

Tonight 20 May Northern Washoe County

Partly cloudy. Lows 44 to 54. Northwest Winds 10 to 15 Mph.

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Boulder Reservoir Temperature Statistics

May Temperature

Alturas (42.9 miles)

  • Lowest 14 May, 2026

    28.7 °F

  • Average May

    56 °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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