Postans Weather Forecast

    • 16
    • 19

    Mostly clear

    • 15
    • 19

    Cloudy

    • 12
    • 21

    Partly cloudy

    • 14
    • 24

    Mostly sunny

    • 17
    • 28

    Mostly sunny

    • 19
    • 23

    Possible shower

    • 15
    • 19

    Showers

Today 12 Sep Perth

Clear. Light winds.

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Postans Temperature Statistics View More

September Temperature

Garden Island (12km)

  • Lowest 1 September, 2026

    10.2 °C

  • Average September

    16.1 °C

  • Highest 11 September, 2026

    25 °C

Climate (2021–2026)

Garden Island (12km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    23.3 °C
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