Light drizzle,warmer tomorrow
European, the American and the German model agree on a high near 18° in Perth today. Tomorrow looks partly cloudy around 22°, with a 0% chance of rain.
Perth, Western Australia. Below we compare what European, American, German forecast for Perth right now and flag exactly where they disagree, then break down Perth's weather month by month and which forecast model has been most accurate here.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in Australia before you trust any single number.
Here 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.
Perth runs from warm summers, with February highs near 32°C, to cold winters, when June lows sit around 10°C (a swing of about 22°C across the year). June is usually the wettest month, and Perth sees roughly 615 mm of precipitation annually.
The most comfortable time to visit Perth is usually April, May, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest June rain is behind you.
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1493 cities. Lower error means a higher score. See which forecast model is most accurate in Australia, how we measure forecast accuracy, or which model each weather app uses.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Perth, scoring 87/100 on our CheckWeather Score, ahead of the American at 83. See the full AU accuracy scoreboard for exactly how every model is tested.
The models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.