Mount Heinen Weather Forecast

    • 42
    • 61

    Mostly Sunny

    • 48
    • 68

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

    • 48
    • 69

    Mostly Sunny

    • 50
    • 72

    Mostly Sunny

Today 14 Sep Boise Mountains

Areas of fog this morning. Sunny. Highs 56 to 70.

Tonight 14 Sep Boise Mountains

Mostly clear. Patchy fog after midnight. Lows 28 to 43.

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  • Temperature Real-Time

Mount Heinen Temperature Statistics

September Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 3 September, 2026

    46.7 °F

  • Average September

    65.3 °F

  • Highest 10 September, 2026

    88.6 °F

Climate (2021–2026)

Boise Air Terminal (19.3 miles)

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  • Average Low 2021–2026

    44.1 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    66.3 °F
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