Duncan Weather Forecast

    • 56
    • 79

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 57
    • 80

    Partly Sunny

    • 58
    • 79

    Mostly Cloudy

    • 56
    • 77

    Mostly Cloudy

    • 53
    • 73

    Chance Rain Showers

Today 21 Oct Stephens

Sunny. Highs in the upper 70s. Southeast Winds 5 to 10 Mph.

Tonight 21 Oct Stephens

Mostly clear. Lows in the mid 50s. Southeast Winds around 5 Mph.

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Duncan Temperature Statistics

October Temperature

Duncan, Halliburton Field Airport (1.9 miles)

  • Lowest 17 October, 2026

    39.2 °F

  • Average October

    69 °F

  • Highest 7 October, 2026

    89.6 °F

Climate (2021–2026)

Duncan, Halliburton Field Airport (1.9 miles)

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  • Average Low 2021–2026

    53 °F

  • Average 2021–2026

    64.3 °F

  • Average High 2021–2026

    76.4 °F
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