Garden Valley Weather Forecast

    • 46
    • 83

    Sunny

    • 48
    • 88

    Partly Sunny

    • 47
    • 88

    Partly Sunny

    • 48
    • 88

    Mostly Sunny

    • 49
    • 92

    Partly Sunny

    • 41
    • 81

    Partly Sunny

    • 39
    • 73

    Partly Sunny

Today 20 Sep Boise Mountains

Patchy fog in the morning. Mostly sunny. Highs 58 to 73.

Tonight 20 Sep Boise Mountains

Mostly clear. Lows 35 to 50.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Garden Valley Temperature Statistics

September Temperature

Boise Air Terminal (38.5 miles)

  • Lowest 3 September, 2026

    46.7 °F

  • Average September

    65.8 °F

  • Highest 12 September, 2026

    90.6 °F

Climate (2021–2026)

Boise Air Terminal (38.5 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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