Southwest Ada County Alliance Weather Forecast

    • 31
    • 55

    Becoming Sunny

    • 38
    • 57

    Partly Sunny

    • 44
    • 67

    Partly Sunny

    • 36
    • 60

    Partly Sunny

    • 41
    • 63

    Mostly Cloudy

    • 44
    • 63

    Mostly Cloudy

    • 43
    • 68

    Chance Rain Showers

Today 30 Oct Upper Treasure Valley

Areas of fog this morning. Sunny. Highs 52 to 57. Light Winds.

Tonight 30 Oct Upper Treasure Valley

Decreasing Clouds. Lows 28 to 34. Light Winds.

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Southwest Ada County Alliance Temperature Statistics

October Temperature

Boise Air Terminal (3.1 miles)

  • Lowest 28 October, 2025

    33.1 °F

  • Average October

    53 °F

  • Highest 10 October, 2025

    84 °F

Climate (2020–Present)

Boise Air Terminal (3.1 miles)

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  • Average Low 2020–2025

    43.8 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    65.7 °F
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