Big Roaring River Lake Weather Forecast

    • 32
    • 53

    Mostly Sunny

    • 32
    • 53

    Decreasing Clouds

    • 31
    • 54

    Mostly Sunny

    • 44
    • 62

    Partly Sunny

    • 43
    • 61

    Mostly Sunny

    • 45
    • 66

    Partly Sunny

    • 39
    • 61

    Partly Sunny

Today 7 May Boise Mountains

Sunny. Highs 62 to 77. Breezy.

Tonight 7 May Boise Mountains

Mostly clear. Lows 32 to 47.

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Big Roaring River Lake Temperature Statistics

May Temperature

Boise Air Terminal (39.8 miles)

  • Lowest 1 May, 2026

    48.7 °F

  • Average May

    64.8 °F

  • Highest 3 May, 2026

    81.6 °F

Climate (2021–Present)

Boise Air Terminal (39.8 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.2 °F
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