An alternative way to discover Sydney
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Upper Swan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Upper Swan.
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Climate overview of Upper Swan
Temperatures in Upper Swan, Western Australia, Australia, vary greatly throughout the year. January is the hottest month at 33°C (91°F), while July is the coldest at 18°C (64°F).
Annual rainfall is moderate at around 514 mm (20 in), with July being the wettest month. The city also has a distinct dry season from October to April, with very warm summers and pleasant winters. The sunniest month is January, with 11.8 hours of sunshine per day on average.
Upper Swan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Upper Swan - and find the best time to visit.
Monthly Temperature in Upper Swan
The climate in Upper Swan is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a very warm 33°C (91°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 Upper Swan
Generally, Upper Swan receives mid-range precipitation levels, with 514 mm (20 in) annually. Upper Swan can be quite wet during July, receiving approximately 88 mm (3.5 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 Upper Swan 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 Upper Swan
Upper Swan 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
Data from: Perth, Australia (19 KM, 12 Miles).
Daily hours of sunshine
Data from: Perth, Australia (19 KM, 12 Miles).
Water Temperature in Upper Swan
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
Data from: Perth, Australia (19 KM, 12 Miles).
Humidity in Upper Swan by Month
The relative humidity is moderate throughout the year in Upper Swan.
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
Data from: Perth, Australia (19 KM, 12 Miles).
Wind Speed in Upper Swan
The mean wind speed varies between 5 m/s (10 knots) and 7 m/s (14 knots) throughout the year. It is lowest in May, June and July and highest during January, February, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Data from: Perth, Australia (19 KM, 12 Miles).
Best Time to Visit Upper Swan
Conditions in Upper Swan are generally most comfortable in April, May, September, October and November. They are typically least comfortable in January and February.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
good
Feb
good
Mar
very good
Apr
excellent
May
excellent
Jun
very good
Jul
very good
Aug
very good
Sep
excellent
Oct
excellent
Nov
excellent
Dec
very good
- 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 Upper Swan
What is the best time to visit Upper Swan?
April, May, September, October and November typically offer the most optimal weather in Upper Swan. In contrast, January and February tend to have less optimal conditions. Upper Swan has a distinct dry season from October to April, with very warm summers and pleasant winters.
What temperatures can I expect in Upper Swan?
Daytime highs range from 18°C (64°F) in July to 33°C (91°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 Upper Swan get?
Annual rainfall is around 514 mm (20 in). July is the wettest month with 88 mm (3.5 in), while December is the driest with 12 mm (0.5 in).
How sunny is Upper Swan?
Upper Swan 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, Upper Swan enjoys abundant sunshine.
Upper Swan 3-Day Forecast
Upper Swan on the map
Upper Swan is highlighted - select any city to see its climate.
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