September weather forecastManly, Australia
September
Weather in September
The first month of the spring, September, is still a comfortable month in Manly, Australia, with temperature in the range of an average high of 19.8°C (67.6°F) and an average low of 13.2°C (55.8°F).Temperature
The shift into September finds Manly at an average high-temperature of a still enjoyable 19.8°C (67.6°F), closely comparable to August's conditions. Manly experiences an average low-temperature reading of 13.2°C (55.8°F) throughout September.Humidity
In September, the average relative humidity is 67%.Rainfall
September is the month with the least rainfall. Rain falls for 8.7 days and accumulates 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.Note: Swimming is not enjoyable for most people in water that is 18.6°C (65.5°F). As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing control becomes harder.
Daylight
The average length of the day in September is 11h and 53min.On the first day of September in Manly, Australia, sunrise is at 6:12 am and sunset at 5:36 pm. On the last day of the month, sunrise is at 5:32 am and sunset at 5:56 pm AEST.
Sunshine
In Manly, the average sunshine in September is 8.9h.UV index
The months with the lowest UV index are June through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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
Manly, 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).
