September weather forecastPerth, Canada
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Perth, Canada, with an average temperature ranging between max 20.7°C (69.3°F) and min 10.7°C (51.3°F).Temperature
Perth's progression into September involves a gentle drop in the average high-temperature, from a moderately hot 24.4°C (75.9°F) in August to a pleasant 20.7°C (69.3°F). Throughout the nights in September, Perth experiences an average low-temperature of 10.7°C (51.3°F).Humidity
The average relative humidity in September is 79%.Rainfall
In September, in Perth, the rain falls for 11.7 days. Throughout September, 45mm (1.77") of precipitation is accumulated. Throughout the year, there are 141.7 rainfall days, and 669mm (26.34") of precipitation is accumulated.Snowfall
In Perth, Canada, snow does not fall in June through September.Daylight
In Perth, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:46 pm EDT.
Sunshine
In Perth, the average sunshine in September is 9.1h.UV index
In Perth, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Perth, Canada
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is July (25.1°C).
The month with the lowest average high temperature is January (-4.4°C).
- Average low temperature in September: 10.7°C
The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (-11.8°C).
Average pressure in September
Perth, Canada
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1012.7mbar).
Average wind speed in September
Perth, Canada
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is February (14.9km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).
Average humidity in September
Perth, Canada
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Perth, Canada
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is August (70mm).
The driest months (with the least rainfall) are March and November (43mm).
Average rainfall days in September
Perth, Canada
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is January (5 days).
Average snowfall in September
Perth, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (157mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Perth, Canada
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Perth, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 6min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in September
Perth, Canada
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in September
Perth, Canada
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Perth, Canada
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Perth, Canada
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February, March and December (8km).
