September weather forecastMosman, Australia
September
Weather in September
September, the first month of the spring in Mosman, is also an enjoyable month, with an average temperature varying between 13.2°C (55.8°F) and 19.8°C (67.6°F).Temperature
Mosman's shift from August to September is accompanied by an average high-temperature of a still enjoyable 19.8°C (67.6°F), a slight deviation from 17.4°C (63.3°F). In September, Mosman experiences an average nighttime temperature of 13.2°C (55.8°F).Humidity
In September, the average relative humidity in Mosman is 67%.Rainfall
The month with the least rainfall in Mosman is September, when the rain falls for 8.7 days and typically collects 32mm (1.26") of precipitation.Sea temperature
With an average sea temperature of 18.6°C (65.5°F), September is the month with the coldest seawater in Mosman.Note: Most people do not enjoy swimming in water of 18.6°C (65.5°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day in Mosman, Australia, is 11h and 53min.On the first day of the month, sunrise is at 6:12 am and sunset at 5:37 pm. On the last day of September, sunrise is at 5:32 am and sunset at 5:56 pm AEST.
Sunshine
In September, the average sunshine is 8.9h.UV index
June through September, with an average maximum UV index of 4, are months with the lowest UV index in Mosman. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. When the Sun is at its strongest around midday, find shade and limit exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mosman, Australia
- Average high temperature in September: 19.8°C
The warmest month (with the highest average high temperature) is January (26.2°C).
The month with the lowest average high temperature is July (16.4°C).
- Average low temperature in September: 13.2°C
The month with the highest average low temperature is January (20.3°C).
The coldest months (with the lowest average low temperature) are July and August (10.9°C).
Average pressure in September
Mosman, Australia
- Average pressure in September: 1017.1mbar
The month with the highest atmospheric pressure is June (1020.8mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in September
Mosman, Australia
- Average wind speed in September: 16.6km/h
The windiest month (with the highest average wind speed) is August (16.8km/h).
The calmest month (with the lowest average wind speed) is April (14.6km/h).
Average humidity in September
Mosman, Australia
- Average humidity in September: 67%
The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Mosman, Australia
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is February (95mm).
The driest month (with the least rainfall) is September (32mm).
Average rainfall days in September
Mosman, Australia
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is September (8.7 days).
Average sea temperature in September
Mosman, Australia
- Average sea temperature in September: 18.6°C
The best month for swimming (with the highest average sea temperature) is February (23.7°C).
The coldest month (with the lowest average sea temperature) is September (18.6°C).
Average daylight in September /
Average sunshine in September
Mosman, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is November (Average sunshine: 10h and 0min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in September
Mosman, Australia
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is August (20.4 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in September
Mosman, Australia
- Average UV index in September: 4
The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are June, July, August and September (UV index 4).
Average cloud cover in September
Mosman, Australia
- Average cloud cover in September: 25
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Mosman, 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).
