Western Australia weather in May
May is a fair month to visit Western Australia: highs of 21°C (70°F) and about 84 mm (3.3 in) of rain on average. Nights average 16°C (61°F) and cloud cover 54% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 6th coolest. Compared with April, it is cooler and wetter; June brings highs of 19°C (66°F) and 113 mm (4.4 in) of rain.
Figures are long-term averages for Perth, the largest city in Western Australia. See below for other places.
Is May a good time to visit Western Australia?
fair month Weather score 75/100.
May is a fair month in Western Australia. The weather is usually best in Oct–Apr.
Does it rain a lot in Western Australia in May?
Some rain is normal: about 84 mm (3.3 in) falls in an average May. It is the 4th wettest month of the year.
How warm is Western Australia in May?
Days average 21°C (70°F) and nights 16°C (61°F).
Western Australia weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 26°C (79°F) | 19°C (67°F) | 18 mm | 33% | best |
| February | 27°C (80°F) | 20°C (68°F) | 17 mm | 37% | best |
| March | 26°C (79°F) | 19°C (67°F) | 20 mm | 40% | best |
| April | 23°C (74°F) | 18°C (64°F) | 34 mm | 51% | best |
| May | 21°C (70°F) | 16°C (61°F) | 84 mm | 54% | fair |
| June | 19°C (66°F) | 15°C (58°F) | 113 mm | 59% | least pleasant |
| July | 18°C (64°F) | 14°C (57°F) | 128 mm | 60% | least pleasant |
| August | 18°C (64°F) | 14°C (56°F) | 106 mm | 58% | least pleasant |
| September | 18°C (65°F) | 14°C (56°F) | 70 mm | 53% | fair |
| October | 20°C (68°F) | 15°C (58°F) | 32 mm | 45% | best |
| November | 22°C (72°F) | 16°C (61°F) | 25 mm | 40% | best |
| December | 25°C (76°F) | 18°C (64°F) | 12 mm | 36% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Western Australia in May
Weather can differ a lot within Western Australia: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Perth | 21°C (70°F) | 16°C (61°F) | 84 mm | fair |
| Mandurah | 21°C (69°F) | 16°C (60°F) | 97 mm | fair |
| Bunbury | 20°C (68°F) | 12°C (53°F) | 97 mm | fair |
| Geraldton | 22°C (72°F) | 19°C (66°F) | 55 mm | fair |
| Baldivis | 21°C (69°F) | 16°C (60°F) | 97 mm | fair |
| Albany | 19°C (66°F) | 14°C (57°F) | 66 mm | fair |
| Canning Vale | 21°C (70°F) | 16°C (61°F) | 84 mm | fair |
| Kwinana | 21°C (70°F) | 16°C (61°F) | 84 mm | fair |
| Kalgoorlie | 22°C (71°F) | 8°C (46°F) | 16 mm | best |
| Busselton | 20°C (68°F) | 12°C (53°F) | 97 mm | fair |
| Ellenbrook | 21°C (69°F) | 9°C (49°F) | 74 mm | fair |
| Dianella | 21°C (70°F) | 16°C (61°F) | 84 mm | fair |