Mount Heinen Weather Forecast

    • 21
    • 33

    Mostly Sunny

    • 21
    • 30

    Partly Sunny

    • 17
    • 32

    Mostly Sunny

    • 20
    • 29

    Sunny

    • 23
    • 34

    Mostly Sunny

    • 26
    • 36

    Partly Sunny

    • 28
    • 39

    Partly Sunny

Today 21 Jan Boise Mountains

Patchy fog this morning. Mostly sunny. Highs 28 to 38.

Tonight 21 Jan Boise Mountains

Mostly clear. Patchy fog after midnight. Lows 9 to 22.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Heinen Temperature Statistics

January Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 16 January, 2026

    24.1 °F

  • Average January

    35.3 °F

  • Highest 3 January, 2026

    57.9 °F

Climate (2021–Present)

Boise Air Terminal (19.3 miles)

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  • Average Low 2021–2026

    44.1 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    66 °F
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