Packer John Mountain Weather Forecast

    • 55
    • 73

    Increasing Clouds

    • 54
    • 74

    Mostly Cloudy

    • 51
    • 71

    Partly Sunny

    • 45
    • 66

    Mostly Sunny

    • 49
    • 68

    Sunny

    • 51
    • 74

    Partly Sunny

Today 18 Sep Boise Mountains

Areas of fog in the morning. Sunny. Highs 72 to 86.

Tonight 18 Sep Boise Mountains

Mostly cloudy. Lows 42 to 57.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Packer John Mountain Temperature Statistics

September Temperature

Boise Air Terminal (45.4 miles)

  • Lowest 15 September, 2025

    48.9 °F

  • Average September

    73 °F

  • Highest 1 September, 2025

    100 °F

Climate (2020–Present)

Boise Air Terminal (45.4 miles)

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  • Average Low 2020–2025

    43.8 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    65.8 °F
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