Duncan Weather Forecast

    • 14
    • 19

    Showers

    • 12
    • 19

    Showers

    • 8
    • 16

    Shower or two

    • 7
    • 15

    Partly cloudy

    • 8
    • 17

    Cloudy

    • 7
    • 18

    Partly cloudy

    • 9
    • 15

    Possible shower

Today 30 Sep Kangaroo Island

Cloudy. Very high chance of showers, becoming less likely in the late morning. The chance of a thunderstorm this evening. Light winds becoming west to northwesterly 15 to 25 km/h in the morning then becoming light in the late afternoon. Daytime maximum temperatures around 20.

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Duncan Temperature Statistics View More

September Temperature

Kingscote Airport (35km)

  • Lowest 18 September, 2026

    1.8 °C

  • Average September

    12.9 °C

  • Highest 19 September, 2026

    25.5 °C

Climate (2021–2026)

Kingscote Airport (35km)

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  • Average Low 2021–2026

    9.3 °C

  • Average 2021–2026

    14.8 °C

  • Average High 2021–2026

    21.1 °C
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