September weather forecastCottesloe, Australia
September
Weather in September
September, the first month of the spring in Cottesloe, is still a refreshing month, with an average temperature fluctuating between 18.3°C (64.9°F) and 12.3°C (54.1°F).Temperature
As Cottesloe, Australia, steps into September, the average high-temperature is measured at a still refreshing 18.3°C (64.9°F), displaying minor differences from August's 17.5°C (63.5°F). The average low-temperature during September nights is a cool 12.3°C (54.1°F).Humidity
The average relative humidity in September in Cottesloe is 70%.Rainfall
In Cottesloe, during September, the rain falls for 12.9 days and regularly aggregates up to 36mm (1.42") of precipitation. In Cottesloe, Australia, during the entire year, the rain falls for 114 days and collects up to 404mm (15.91") of precipitation.Sea temperature
With an average sea temperature of 18.7°C (65.7°F), September is the month with the coldest seawater.Note: In water of 18.7°C (65.7°F), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Cottesloe, the average length of the day in September is 11h and 54min.On the first day of September in Cottesloe, Australia, sunrise is at 6:33 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 6:18 pm AWST.
Sunshine
In Cottesloe, the average sunshine in September is 8.2h.UV index
In Cottesloe, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cottesloe, Australia
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is February (27.7°C).
The month with the lowest average high temperature is July (17.2°C).
- Average low temperature in September: 12.3°C
The month with the highest average low temperature is February (19.8°C).
The coldest months (with the lowest average low temperature) are July and August (12.2°C).
Average pressure in September
Cottesloe, Australia
- Average pressure in September: 1019mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is January (1011.5mbar).
Average wind speed in September
Cottesloe, Australia
- Average wind speed in September: 17.9km/h
The windiest month (with the highest average wind speed) is January (19.7km/h).
The calmest month (with the lowest average wind speed) is April (16.2km/h).
Average humidity in September
Cottesloe, Australia
- Average humidity in September: 70%
The month with the highest relative humidity is August (72%).
The months with the lowest relative humidity are January, February and December (59%).
Average rainfall in September
Cottesloe, Australia
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is June (75mm).
The driest month (with the least rainfall) is March (11mm).
Average rainfall days in September
Cottesloe, Australia
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (4.3 days).
Average sea temperature in September
Cottesloe, Australia
- Average sea temperature in September: 18.7°C
The best month for swimming (with the highest average sea temperature) is March (23.3°C).
The coldest month (with the lowest average sea temperature) is September (18.7°C).
Average daylight in September /
Average sunshine in September
Cottesloe, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 12min
The months with the most sunshine are January and December (Average sunshine: 11h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 42min).
Average sunshine days in September
Cottesloe, Australia
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is December (24.2 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Cottesloe, Australia
- Average UV index in September: 5
The months with the highest UV index are January, February, March and December (UV index 6).
The months with the lowest UV index are June, July and August (UV index 4).
Average cloud cover in September
Cottesloe, Australia
- Average cloud cover in September: 32
The month with the most cloud cover is July (Cloud cover 39).
The month with the least cloud cover is January (Cloud cover 13).
Average visibility in September
Cottesloe, Australia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
