Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The advent of September presents an average high-temperature of a moderate 14.5°C (58.1°F), maintaining a close correlation with the preceding month. September sees the temperature falling to a mean low of 8.2°C (46.8°F).Humidity
The average relative humidity in September in Perth is 87%.Rainfall
In Perth, during September, the rain falls for 15 days and regularly aggregates up to 33mm (1.3") of precipitation. In Perth, during the entire year, the rain falls for 193.4 days and collects up to 508mm (20") of precipitation.Snowfall
In Perth, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 45min.On the first day of September in Perth, sunrise is at 6:18 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:50 pm BST.
Sunshine
In Perth, the average sunshine in September is 6.5h.UV index
In September, the average daily maximum UV index in Perth is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What is the usual temperature for Perth in September?
What is the average humidity in September in Perth?
How many days does it rain in September in Perth?
When it does not snow in Perth?
How many hours of daylight does Perth have in September?
When are sunrise and sunset in September in Perth?
How long on average sun shines in September in Perth?
How high is the UV index in September in Perth?
Average temperature in September
Perth, United Kingdom
- Average high temperature in September: 14.5°C
The warmest month (with the highest average high temperature) is July (17.1°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 8.2°C
The month with the highest average low temperature is August (9.4°C).
The coldest month (with the lowest average low temperature) is January (0.8°C).
Average pressure in September
Perth, United Kingdom
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in September
Perth, United Kingdom
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is January (16.6km/h).
The calmest months (with the lowest average wind speed) are June and July (11.1km/h).
Average humidity in September
Perth, United Kingdom
- Average humidity in September: 87%
The months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is April (81%).
Average rainfall in September
Perth, United Kingdom
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is August (67mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Perth, United Kingdom
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is July (21.9 days).
The month with the least rainy days is February (11.9 days).
Average snowfall in September
Perth, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (55mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Perth, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Perth, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).
- Average sunshine in September: 6h and 3min
The month with the most sunshine is June (Average sunshine: 7h and 30min).
The months with the least sunshine are February and October (Average sunshine: 4h and 12min).
Average sunshine days in September
Perth, United Kingdom
- Average sunshine days in September: 10.9 days
The month with the most sunshine days is November (13.8 days).
The month with the least sunshine days is July (5.5 days).
Average UV index in September
Perth, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Perth, United Kingdom
- Average cloud cover in September: 56
The month with the most cloud cover is June (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in September
Perth, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May and December (9km).
The months with the lowest visibility are June, July, August, September, October and November (8km).
Perth, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
