Perth Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Perth.
Climate overview of Perth
Perth Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Perth - and find the best time to visit.
Monthly Temperature in Perth
Depending on the time of the year, temperatures range from very warm to pleasant in Perth. Average daytime temperatures reach a very warm 32°C (90°F) in January. In July, the coolest month of the year, temperatures drop to a pleasant 18°C (64°F).
At night, temperatures range from around 19°C (66°F) in January to 9°C (48°F) in July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Perth
Generally, Perth has a moderate amount of precipitation, averaging 565 mm (22 in) of rainfall annually. Perth can be quite wet during July, receiving approximately 100 mm (3.9 in) of precipitation over 15 rainy days.
In contrast, during the driest month (December), you will experience much drier conditions, with 12 mm (0.5 in) of precipitation spread across 4 rainy days. For more details, please visit our Perth Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Perth
Perth can be enjoyed more throughout the sunniest month of January under a blue sky, with approximately 11.8 hours of sunshine daily. In contrast, the city experiences much darker days in June, with only 5.9 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Water Temperature in Perth
The mean water temperature over the year ranges from 17°C (63°F) in August to 21°C (70°F) in March.
Water temperature over the year
Humidity in Perth by Month
The relative humidity is moderate throughout the year in Perth.
The city experiences its highest humidity in July, reaching 57%. In February, the humidity drops to its lowest level at 38%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Perth
The average wind speed over the year ranges from 5 m/s (10 knots) to 7 m/s (14 knots). It is lower in May, June and July and higher in January, February, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Perth
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, September, October and November
- Warmest weather: January and February
- Most sunshine: January and December
- Fewest rainy days: January, November and December
- Best for swimming: January, February, March, April and May.
- Seasonal pattern: A distinct dry season from October to April, with very warm summers and pleasant winters
Frequently asked questions about the climate in Perth
What is the best time to visit Perth?
April, May, September, October and November typically offer the most optimal weather in Perth. In contrast, July tends to have less optimal conditions. Perth has a distinct dry season from October to April, with very warm summers and pleasant winters.
What temperatures can I expect in Perth?
Daytime highs range from 18°C (64°F) in July to 32°C (90°F) in January. Nighttime lows range from 9°C (48°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Perth get?
Annual rainfall is around 565 mm (22 in). July is the wettest month with 100 mm (3.9 in), while December is the driest with 12 mm (0.5 in).
How sunny is Perth?
Perth receives around 3,224 hours of sunshine per year. January is the sunniest month with 355 hours, while June is the cloudiest with just 178 hours. Overall, Perth enjoys abundant sunshine.
Perth 3-Day Forecast
Perth on the map
Perth is highlighted - select any city to see its climate.
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