Mount Heinen Weather Forecast

    • 67
    • 84

    Gradual Clearing

    • 66
    • 86

    Partly Sunny

    • 67
    • 87

    Mostly Sunny

    • 72
    • 91

    Partly Sunny

    • 71
    • 91

    Partly Sunny

    • 66
    • 83

    Partly Sunny

    • 65
    • 81

    Mostly Sunny

Today 17 Aug Boise Mountains

Mostly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Chance of rain 20 percent. Highs 77 to 92.

Tonight 17 Aug Boise Mountains

Mostly cloudy with a slight chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Chance of rain 20 percent. Lows 47 to 62.

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Mount Heinen Temperature Statistics

August Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 3 August, 2026

    54.6 °F

  • Average August

    78.7 °F

  • Highest 1 August, 2026

    101.6 °F

Climate (2021–2026)

Boise Air Terminal (19.3 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    66.2 °F
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