Adelaide
Australia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Adelaide, Australia

September, the first month of the spring, in Adelaide, is still a comfortable month, with average temperature varying between 9.7°C (49.5°F) and 19°C (66.2°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still comfortable 19°C (66.2°F). In Adelaide, Australia, in September, the average low-temperature is 9.7°C (49.5°F).

Humidity

In September, the average relative humidity is 51%.

Rainfall

In Adelaide, in September, it is raining for 13.4 days, with typically 58.7mm (2.3") of accumulated precipitation. In Adelaide, during the entire year, the rain falls for 120.5 days and collects up to 543.9mm (21.4") of precipitation.

Sea temperature

August through October, with an average sea temperature of 15°C (59°F), are months with the coldest seawater.
Note: For most, swimming in 15°C (59°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Adelaide, the average length of the day in September is 11.9h.

Sunshine

In September, the average sunshine in Adelaide is 6.8h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Adelaide?

The average high-temperature, in September, in Adelaide, Australia, is 19°C (66.2°F), while the average low-temperature is 9.7°C (49.5°F).

What is the average humidity in September in Adelaide?

In Adelaide, the average relative humidity in September is 51%.

How many days does it rain in September in Adelaide?

In September, in Adelaide, Australia, the rain falls for 13.4 days. Throughout September, 58.7mm (2.3") of precipitation is accumulated.

When is the sea coldest in Adelaide?

Through and October, with an average sea temperature of 15°C (59°F).

What is the sea water temperature in September in Adelaide?

In September, the average sea temperature in Adelaide is 15°C (59°F). For swimming, a surface water temperature of 15°C (59°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the average length of the day in September in Adelaide?

The average length of the day in September in Adelaide is 11.9h.

How many hours of sunshine does Adelaide have in September?

In Adelaide, the average sunshine in September is 6.8h.

What is the UV index intensity in September in Adelaide?

In Adelaide, Australia, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Adelaide, Australia
  • Average high temperature in September: 19°C

The warmest month (with the highest average high temperature) is February (29.4°C).
The month with the lowest average high temperature is July (15.3°C).

  • Average low temperature in September: 9.7°C

The month with the highest average low temperature is February (17.2°C).
The coldest month (with the lowest average low temperature) is July (7.5°C).

Average humidity in September - Adelaide, Australia
  • Average humidity in September: 51%

The month with the highest relative humidity is June (61%).
Months with the lowest relative humidity are January and February (36%).

Average rainfall in September - Adelaide, Australia
  • Average rainfall in September: 58.7mm

The wettest month (with the highest rainfall) is June (79.3mm).
The driest month (with the lowest rainfall) is February (13.5mm).

Average rainfall days in September - Adelaide, Australia
  • Average rainfall days in September: 13.4 days

The month with the highest number of rainy days is August (16.6 days).
The month with the lowest number of rainy days is February (3.6 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).
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: 11.9h

The month with the longest days is December (Average daylight: 14.5h).
The month with shortest days is June (Average daylight: 9.8h).

  • Average sunshine in September: 6.8h

The month with most sunshine is January (Average sunshine: 10.5h).
The month with least sunshine is June (Average sunshine: 4.6h).

Average UV index in September - Adelaide, Australia
  • Average UV index in September: 5

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 2).