Duncan Airport Weather Forecast

    • 49
    • 77

    Increasing Clouds

    • 46
    • 71

    Partly Sunny

    • 52
    • 80

    Mostly Sunny

    • 54
    • 83

    Partly Sunny

    • 50
    • 77

    Partly Sunny

    • 49
    • 76

    Partly Sunny

Today 2 Oct Upper Blackfoot and MacDonald Pass

Warmer. Mostly cloudy early in the morning then clearing. Highs 62 to 70. Southwest Winds up to 10 Mph shifting to the west with Gusts to around 30 Mph in the afternoon.

Tonight 2 Oct Upper Blackfoot and MacDonald Pass

Mostly clear. Lows 39 to 45. West Winds 5 to 10 Mph with Gusts to around 25 Mph.

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Duncan Airport Temperature Statistics

October Temperature

Helena Regional Airport (8.7 miles)

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Climate (2021–2026)

Helena Regional Airport (8.7 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    59.9 °F
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