Rottnest Island: Perth in the Background
Perth enjoys a Mediterranean climate with warm, sunny weather for most of the year.
Perth’s climate is extremely sunny, with around 3,200 hours annually. This is higher than any other major Australian city.
There is very little rainfall in summer. Rainfall comes mainly in winter although, even in winter, Perth usually enjoys plenty of pleasantly warm sunshine.
Perth can be windy, especially in the hotter months. The “Fremantle Doctor” is a sea breeze that brings relief from Perth’s high summer heat. It can, however, also blow sand around and, when particularly strong, can be rather hazardous for people on the beach.
On a few days each summer, temperatures rise above 40 degrees Celsius. By any stretch of the imagination, these are extreme temperatures. The best thing you can do on these days is stay at home with your air-conditioning on maximum.
Sea temperatures around Perth are very pleasant.
Perth’s Climate Figures
| Month | Av. Daily Max Temp. (OC) | Av. Daily Min Temp. (OC) | Av. Days with Rainfall | Av. After noon Humidity | Av. hours Sunshine (per day) |
|---|---|---|---|---|---|
| Jan. | 30 | 18 | 3 | 45 | 11 |
| Feb. | 30 | 17 | 3 | 45 | 10 |
| Mar. | 27 | 16 | 5 | 45 | 9 |
| Apr. | 24 | 14 | 8 | 50 | 7 |
| May | 21 | 12 | 15 | 60 | 6 |
| Jun. | 19 | 10 | 17 | 65 | 5 |
| Jul. | 17 | 9 | 18 | 65 | 5 |
| Aug. | 18 | 10 | 19 | 60 | 6 |
| Sep. | 19 | 10 | 15 | 60 | 7 |
| Oct. | 21 | 12 | 12 | 55 | 9 |
| Nov. | 24 | 14 | 6 | 50 | 10 |
| Dec. | 28 | 17 | 5 | 45 | 11 |
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Inland vs Coastal Perth
Inland suburbs of Perth can be significantly hotter than coastal suburbs. Average daily maximum temperatures at Perth Airport – around 10 miles inland – reach around 32 degrees Centigrade in summer.
On the coast, at Fremantle, the average highs are around 4 or 5 degrees lower.