Siphon Lakes Weather Forecast

    • 35
    • 44

    Chance Rain Showers

    • 34
    • 44

    Mostly Sunny

    • 33
    • 46

    Mostly Sunny

    • 32
    • 46

    Partly Sunny

    • 27
    • 41

    Partly Sunny

    • 31
    • 38

    Partly Sunny

    • 33
    • 37

    Mostly Cloudy

Today 20 Nov Boise Mountains

Rain and snow Showers. Areas of fog. Chance of precipitation 80 percent. Snow accumulation up to 1 inch. Highs 37 to 50.

Tonight 20 Nov Boise Mountains

Partly cloudy this Evening, then clearing. Areas of fog. Lows 27 to 36.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Siphon Lakes Temperature Statistics

November Temperature

Boise Air Terminal (20.5 miles)

  • Lowest 8 November, 2025

    34 °F

  • Average November

    50.4 °F

  • Highest 1 November, 2025

    72 °F

Climate (2020–Present)

Boise Air Terminal (20.5 miles)

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  • Average Low 2020–2025

    43.9 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    65.8 °F
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