Merriwa Weather Forecast

    • 23
    • 31

    Mostly sunny

    • 20
    • 28

    Partly cloudy

    • 19
    • 25

    Partly cloudy

    • 17
    • 30

    Sunny

    • 19
    • 30

    Sunny

    • 17
    • 26

    Partly cloudy

    • 16
    • 27

    Partly cloudy

Today 15 Dec Perth

Mostly sunny. The chance of a thunderstorm in the early afternoon. Winds north to northeasterly 20 to 30 km/h shifting westerly in the late morning and early afternoon.

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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Merriwa Temperature Statistics View More

December Temperature

Gingin Airport (26km)

  • Lowest 4 December, 2025

    9.6 °C

  • Average December

    23.1 °C

  • Highest 1 December, 2025

    40 °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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