Boulder Reservoir Weather Forecast

    • 35
    • 57

    Decreasing Clouds

    • 42
    • 64

    Mostly Sunny

    • 46
    • 72

    Mostly Sunny

    • 48
    • 74

    Mostly Sunny

    • 48
    • 76

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

Today 18 May Northern Washoe County

Partly cloudy in the morning then becoming mostly cloudy. Highs 58 to 68. Northeast Winds 10 to 15 Mph.

Tonight 18 May Northern Washoe County

Partly cloudy in the evening then clearing. Lows 33 to 43. Northeast 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

    57 °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

    65 °F
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