Merriwa Weather Forecast

    • 12
    • 19

    Possible shower

    • 11
    • 20

    Partly cloudy

    • 11
    • 21

    Mostly sunny

    • 12
    • 24

    Sunny

    • 13
    • 27

    Sunny

    • 15
    • 27

    Sunny

    • 16
    • 27

    Sunny

Today 18 Sep Perth

Partly cloudy. Medium chance of showers, becoming less likely in the early afternoon. Winds southwesterly 15 to 25 km/h becoming light in the late evening.

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Merriwa Temperature Statistics View More

September Temperature

Gingin Airport (26km)

  • Lowest 1 September, 2025

    1.6 °C

  • Average September

    12.5 °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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