Mount Heinen Weather Forecast

    • 30
    • 33

    Snow

    • 37
    • 38

    Rain/Snow

    • 37
    • 40

    Rain/Snow

    • 40
    • 43

    Rain Likely

    • 33
    • 44

    Rain/Snow Likely

    • 33
    • 42

    Rain/Snow Likely

Today 20 Dec Boise Mountains

Areas of fog in the morning. Sunny. Highs 26 to 40.

Tonight 20 Dec Boise Mountains

Snow. Areas of fog. Chance of snow near 100 percent. Snow accumulation up to 3 Inches. Lows 14 to 29. Temperature rising into the lower 30s after midnight.

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Mount Heinen Temperature Statistics

December Temperature

Boise Air Terminal (19.3 miles)

  • Lowest 1 December, 2025

    21 °F

  • Average December

    41.3 °F

  • Highest 10 December, 2025

    62.1 °F

Climate (2020–Present)

Boise Air Terminal (19.3 miles)

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  • Average Low 2020–2025

    44 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    65.9 °F
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