Mount Heinen Weather Forecast

    • 52
    • 74

    Chance Thunderstorms

    • 49
    • 65

    Slight Chance Rain Showers

    • 51
    • 68

    Mostly Sunny

    • 53
    • 72

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

Today 17 Sep Boise Mountains

Areas of fog this morning. A chance of Thunderstorms. Rain Showers Likely, mainly this afternoon. Chance of rain 60 percent. Highs 68 to 82.

Tonight 17 Sep Boise Mountains

Increasing Clouds. Patchy fog after midnight. Lows 37 to 52.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Heinen Temperature Statistics

September Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 3 September, 2026

    46.7 °F

  • Average September

    65.4 °F

  • Highest 12 September, 2026

    90.6 °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

    66.2 °F
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