Boise City Weather Forecast

    • 65
    • 95

    Sunny

    • 64
    • 99

    Hot

    • 62
    • 95

    Sunny

    • 61
    • 94

    Sunny

    • 67
    • 98

    Hot

    • 69
    • 99

    Hot

Today 18 Aug Upper Treasure Valley

Sunny. Highs 93 to 98. Southeast Winds 10 to 15 Mph.

Tonight 18 Aug Upper Treasure Valley

Mostly clear. Lows 60 to 66. Northwest Winds up to 10 Mph.

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Boise City Temperature Statistics

August Temperature

Boise Air Terminal (6.2 miles)

  • Lowest 8 August, 2025

    51.7 °F

  • Average August

    77.4 °F

  • Highest 12 August, 2025

    102.7 °F

Climate (2020–Present)

Boise Air Terminal (6.2 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    65.8 °F
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