Perth Weather in May
May in Perth sees daytime temperatures around 22°C (72°F) and lows of 12°C (54°F) at night. With around 65 mm (2.6 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Perth in May
Past climate data indicates that roughly 12 days will see rain, totalling around 65 mm (2.6 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Perth in May
May is a perfect month in Perth, with 22°C (72°F) during the day and 12°C (54°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Perth in May
There are approximately 208 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Perth in May
Average wind conditions reach 5 m/s (10 knots) in May. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.
Average water temperature in May
The water sits at 20°C (68°F), which is a nice temperature for swimming. Not too cold, not too warm — most visitors are happy to spend time in the water.If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Perth's climate page.
Perth Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
22°C (72°F)
Water Temperature
20°C (68°F)
Chance of Rain
39%
Precipitation
65 mm (2.6 in)
Rainy days
12 days
Humidity
50%
Windspeed
5 m/s (10 knots)
Sunshine
208 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Perth typically stay consistent throughout May, with daily highs averaging around 22°C (72°F). Nights are cool, with lows typically ranging from 9°C (48°F) to 12°C (54°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Perth in May
Browse day-by-day weather records for Perth spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Perth historical weather extremes in May
The extremes listed below come from historical weather data collected in Perth from 1976 through 2026.
- The warmest day in May was on May 1, 2002, with a maximum of 35°C (95°F).
- On May 27, 1985, Perth saw its coldest May day with temperatures maxing out at 13°C (55°F).
- Perth registered its coldest May night on May 15, 2010, with temperatures dropping to 1°C (34°F).
Best Places in Australia in May
Find out more about the weather in Australia and which places have the best travel conditions in this month. See all of Australia in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Perth in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 20°C (68°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Perth in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Perth's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Perth climate overview or explore weather in Australia.
