Planning a trip to Perth in May? You are in luck! The weather is generally good, with an average maximum temperature of +21°C and approximately 11 sunny days. Just be prepared for some rain, as there are usually around 11 rainy days and 76 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+21°C
Avg. max. temperature
+1°C
Min.
+32°C
Max.
76 mm
Total precipitation
70%
Avg. humidity
4 m/s
Avg. wind
11 ☀️
Sunny Days
8 ⛅️
Cloudy
11 🌦
Rainy
Our opinion: Perth has good weather in May.
Average temperature in Perth in May
Here are the expected maximum, average and minimum temperatures in Perth for May based on the historical data.
Last Year
Historical Data
Going from a maximum of +28°C during the day to a minimum of +2°C during the night, the temperature in May averages around +22°C.
The average maximum temperature goes down 8% by the end of the month, compared with the beginning of the month, from +23°C to +21°C.
Is Perth warm or cold in May?
Perth is typically mild in May.
Maximum temperatures go down compared to the previous month from +25°C to +21°C. The minimum temperature also goes down from +15°C to +12°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how May is compared to other months in Perth:
Water temperature in Perth in May
Water in Perth in May is Comfortable. It varies from +20°C to +24°C, with an average of +22°C.Note that the air temperature is lower than the water temperature, averaging around +21°C.
In May, water temperatures are average relative to the rest of the year:
The warmest water temperatures in Perth are reached in March, when the average sea temperature rises to +23°C. The coldest water temperatures are in September, with an average of +19°C.
Can you swim in Perth in May?
The water in Perth in May is pretty comfortable (+22°C in average). Ideal for swimming, especially in outdoor pools and open water. Suitable for recreational and casual swimmers.
🦭
Cold
Below +16°C
🏄♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
Don’t forget a large beach towel or two for drying off.
Climate in Perth in May
Perth weather looks like this, on average, in May and the surrounding months.
April
May
June
Avg. temperature
+25°C
+21°C
+18°C
Min. temperature
+4°C
+1°C
0°C
Max. temperature
+38°C
+32°C
+25°C
Rainfall
31 mm
76 mm
110 mm
Wind
4 m/s
4 m/s
4 m/s
Avg. water temperature
+23°C
+22°C
+21°C
Humidity
64%
70%
74%
Air pressure
1016 HPa
1018 HPa
1018 HPa
Sunny days
14
11
9
Cloudy days
8
8
5
Rainy days
8
11
15
Snowy days
0
0
0
May weather is still as good as in April.It’s getting colder in May. From +25°C in the day, the average maximum temperature lowers to +21°C.Prepare for more rain. Average rainfall goes from 31 mm to 76 mm.Humidity rises from 64% to 70%.The average wind speed doesn’t change much during May, staying around 4 m/s.The days becoming less sunny, going from 14 sunny days in April to 11 in May.
June brings much the same weather, it remains good.
Wind speed in Perth in May based on historical data.
Last Year
Historical Data
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Perth is gradually decreasing during May, going from 4 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during May in Perth based on historical data.
Last Year
Historical Data
Typically, there is a 29% chance of rain on an average day in May, with total rainfall of approximately 53 mm. The maximum amount of rainfall per day is around 14 mm, which is considered light rain.On average, there are about 9 rainy days during May, so prepare to bring an umbrella.
Here’s how May is compared with other months in the amount of precipitation, total mm:
Perth wettest month is July, where a typical day has a 55% chance of precipitation and 121 mm of rainfall per day. December, on the other hand, is the driest month with a mere 13% chance of precipitation and 10 mm of rainfall per day.
How was the weather last May in Perth?
This is the weather in Perth in May 2023:
1 May
☀️
+23°C
2 May
☀️
+25°C
3 May
☀️
+28°C
4 May
☀️
+25°C
5 May
☀️
+20°C
6 May
🌧️
+17°C
7 May
☀️
+20°C
8 May
☀️
+24°C
9 May
☀️
+26°C
10 May
☁️
+20°C
11 May
☀️
+20°C
12 May
☀️
+24°C
13 May
☀️
+21°C
14 May
☁️
+20°C
15 May
☀️
+21°C
16 May
☀️
+24°C
17 May
☀️
+26°C
18 May
☀️
+27°C
19 May
☀️
+25°C
20 May
☀️
+23°C
21 May
☀️
+22°C
22 May
☀️
+22°C
23 May
🌧️
+24°C
24 May
☀️
+19°C
25 May
☀️
+18°C
26 May
☀️
+19°C
27 May
☀️
+20°C
28 May
☀️
+21°C
29 May
☀️
+22°C
30 May
☀️
+24°C
31 May
🌫️
+21°C
In May 2023 Perth had 26 sunny days, 2 cloudy days, and 2 rainy days. The average maximum temperature was +22°C, with an absolute maximum of +28°C and a minimum of +17°C. The average humidity was 68%, with a maximum of 100% and a minimum of 34%. The average wind speed was 4 m/s, with a maximum of 13 m/s and a minimum of 0 m/s.
Are you planning a trip in May?
Climate Change over Years
This is how Perth climate have been changing during last 43 years period.
The climate in Perth in May has not changed much over the last 43 years.
The average temperature was the lowest in 1990 (+22°C) and the highest in 2023 (+25°C). The driest year was 2010 with only 285 mm of rainfall, and the wettest year was 2012 with 1017 mm.
FAQ
Frequently asked questions about the weather in Perth in May:
Is May a good time to visit Perth?
May is a really good time to go to Perth. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Perth.
Can you sunbathe in Perth in May?
May has mild temperatures in Perth. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Can you swim in Perth in May?
Yes, the water temperature in Perth in May is considered moderate and enjoyable for most people, averaging around +22°C.
Is Perth rainy in May?
Perth is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Perth in May?
The amount of sunny days in Perth during May varies; prepare for a mix of clouds and sun.
Other cities in Australia
Check out the weather for other cities in Australia.
For this page, we’ve looked at the typical weather in Perth, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.