Mount Heinen Weather Forecast

    • 51
    • 68

    Isolated Thunderstorms

    • 55
    • 69

    Partly Sunny

    • 42
    • 64

    Rain Showers

    • 35
    • 49

    Rain Showers Likely

    • 37
    • 51

    Mostly Sunny

    • 40
    • 57

    Partly Sunny

    • 40
    • 57

    Partly Sunny

Today 20 Oct Boise Mountains

Partly cloudy. A slight chance of snow Showers in the morning. Areas of fog in the morning. Chance of snow 20 percent. Highs 50 to 64.

Tonight 20 Oct Boise Mountains

Mostly sunny Early, then becoming mostly clear this Evening, then becoming partly cloudy after midnight. Isolated rain Showers and Thunderstorms this Evening, then a slight chance of rain Showers after midnight. Chance of rain 20 percent. Lows 38 to 49.

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Mount Heinen Temperature Statistics

October Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 13 October, 2026

    37.7 °F

  • Average October

    62.3 °F

  • Highest 4 October, 2026

    88.6 °F

Climate (2021–2026)

Boise Air Terminal (19.3 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.4 °F
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