Perth weather in May (Western Australia, Australia)

You can expect very pleasant temperatures during the day in May. The average maximum daytime temperature in Perth in May lies at 20.9°C (69.62°F). The average minimum temperature goes down to around 8.1°C (46.58°F) (often the minimum temperature is noted at night).

Rainfall during May is moderate with an average of 54mm (2.1 inches). There are generally around 10 rainy days. The sun also shows itself regularly this month with 208 hours of sunshine during the entire month. May is known as one of the best months to visit Perth.


Perth, monthly averages in May

Show in Fahrenheit
Min Temperature 8 °C  
Max Temperature 20 °C  
Water Temperature 20 °C *  
Chance of Rain 34%  
Precipitation 54mm  
Rainy days 10 days  
Humidity 50% *  
Sunshine 208 hrs *  

Where to stay in Perth

Where to go in Australia in May

Find out more about the weather in Australia in May and which places have the best weather conditions in this month.

Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in May? Bring a rain jacket in case it rains during your stay. Plan on layering your clothes, as some days or part of the day it can be nice and warm, while other times it can get quite chilly. At night it tends to cool off so best to pack some warm nightwear as well. With a water temperature of around 20.0°C (68°F), this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in May.

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Perth.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Australia? On this website you can find historical weather averages for many cities in Australia. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.