September weather forecastAdelaide, Australia
September
Weather in September
As the threshold of Spring, September presents a welcomed climb in temperature to an average high of 16.4°C (61.5°F). The rainfall begins its descent as the Spring bloom takes over the city of Adelaide. Wind speeds taper off, making conditions less gusty and more suited for outdoor indulgence. The cloud cover recedes to 33%, allowing bright sunshine to adorn the city. A further rise in temperature paired with declining precipitation and wind speed is observed as the city moves towards October.Temperature
With the onset of September, Adelaide's average high-temperature clocks in at an enjoyable 16.4°C (61.5°F), showing a minor fluctuation from the previous month. The nighttime temperature, during September, averages of 9.9°C (49.8°F).Humidity
In Adelaide, Australia, the average relative humidity in September is 69%.Rainfall
In September, the rain falls for 11.8 days. Throughout September, 25mm (0.98") of precipitation is accumulated. In Adelaide, during the entire year, the rain falls for 126.2 days and collects up to 326mm (12.83") of precipitation.Sea temperature
August through October, with an average sea temperature of 15°C (59°F), are months with the coldest seawater.Note: Swimming in 15°C (59°F) is not an enjoyable experience for most. Breathing becomes progressively more challenging as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September is 11h and 52min.On the first day of the month, sunrise is at 6:34 am and sunset at 5:56 pm. On the last day of September, in Adelaide, sunrise is at 5:53 am and sunset at 6:17 pm ACST.
Sunshine
The average sunshine in September in Adelaide is 8h.UV index
In Adelaide, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Ensure safety - Recommendations to avert sunburn are presented. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Adelaide, Australia
- Average high temperature in September: 16.4°C
The warmest month (with the highest average high temperature) is January (26.3°C).
The month with the lowest average high temperature is July (13.9°C).
- Average low temperature in September: 9.9°C
The month with the highest average low temperature is January (17.8°C).
The coldest month (with the lowest average low temperature) is August (9.1°C).
Average pressure in September
Adelaide, Australia
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is June (1021.8mbar).
The month with the lowest atmospheric pressure is January (1012.4mbar).
Average wind speed in September
Adelaide, Australia
- Average wind speed in September: 15.7km/h
The windiest month (with the highest average wind speed) is August (16.3km/h).
The calmest month (with the lowest average wind speed) is April (12.9km/h).
Average humidity in September
Adelaide, Australia
- Average humidity in September: 69%
The months with the highest relative humidity are June and July (74%).
The month with the lowest relative humidity is January (58%).
Average rainfall in September
Adelaide, Australia
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is August (43mm).
The driest month (with the least rainfall) is March (16mm).
Average rainfall days in September
Adelaide, Australia
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is February (6.2 days).
Average sea temperature in September
Adelaide, Australia
- Average sea temperature in September: 15°C
The best month for swimming (with the highest average sea temperature) is February (20°C).
The coldest months (with the lowest average sea temperature) are August, September and October (15°C).
Average daylight in September /
Average sunshine in September
Adelaide, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is December (Average sunshine: 10h and 6min).
The month with the least sunshine is August (Average sunshine: 7h and 6min).
Average sunshine days in September
Adelaide, Australia
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is August (12.7 days).
Average UV index in September
Adelaide, Australia
- Average UV index in September: 4
The months with the highest UV index are February and December (UV index 6).
The month with the lowest UV index is June (UV index 3).
Average cloud cover in September
Adelaide, Australia
- Average cloud cover in September: 33
The month with the most cloud cover is July (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 20).
Average visibility in September
Adelaide, 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).
