Merriwa Weather Forecast

    • 14
    • 19

    Showers. Very windy

    • 11
    • 17

    Shower or two

    • 9
    • 18

    Possible shower

    • 12
    • 20

    Showers

    • 12
    • 18

    Shower or two

    • 12
    • 19

    Possible shower

    • 10
    • 21

    Mostly sunny

Today 14 Sep Perth

Cloudy. Very high chance of showers, most likely during the morning and afternoon. The chance of a thunderstorm in the southwest during the morning and afternoon. Damaging winds possible during the morning and afternoon. Winds northwesterly 35 to 50 km/h tending westerly 40 to 60 km/h in the middle of the day then decreasing to 30 to 45 km/h in the evening.

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  • Temperature Forecast Bureau of Meteorology

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Merriwa Temperature Statistics View More

September Temperature

Gingin Airport (26km)

  • Lowest 1 September, 2025

    1.6 °C
  • Average September

    12.4 °C
  • Highest 12 September, 2025

    26.6 °C

Climate (2020–Present)

Gingin Airport (26km)

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  • Average Low 2020–2025

    11.5 °C
  • Average 2020–2025

    18.3 °C
  • Average High 2020–2025

    26.2 °C
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