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.
Merriwa Temperature Statistics View More
September Temperature
Gingin Airport (26km)
Lowest 1 September, 2025
1.6 °CAverage September
12.4 °CHighest 12 September, 2025
26.6 °C
Climate (2020–Present)
Gingin Airport (26km)
Average Low 2020–2025
11.5 °CAverage 2020–2025
18.3 °CAverage High 2020–2025
26.2 °C