Perth weather in September
Long-run climate averages for Perth, Western Australia in September, plus what the forecast models say for the days ahead.
In September, Perth averages 20°C by day and 12°C at night. The wettest month is usually June.
September in Perth averages a daytime high of 20°C and an overnight low of 12°C, which reads as mild for this part of the world. Across the whole year Perth sees roughly 615 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Perth forecast with every model compared and how much they currently agree.
Perth weather by month
what to expect in Perth through the yearHere is Perth's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Perth by season.