Brisbane
Australia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Brisbane, Australia

Sunset in Brisbane, Australia, with a view of the Brisbane River and cloudy evening skies
Sunset in Brisbane, Australia, with a view of the Brisbane River and cloudy evening skies
The first month of the spring, September, is still a pleasant month in Brisbane, Australia, with average temperature ranging between max 22.9°C (73.2°F) and min 15.3°C (59.5°F).

Temperature

In Brisbane, the average high-temperature is almost the same as in August - a still agreeable 22.9°C (73.2°F). In September, the average low-temperature is 15.3°C (59.5°F).

Humidity

In September, the average relative humidity is 69%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 26mm (1.02") of precipitation.

Sea temperature

In Brisbane, Australia, in September, the average water temperature is 22°C (71.6°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22°C (71.6°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)

Daylight

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

Sunshine

In September, the average sunshine is 8.8h.

UV index

In Brisbane, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Brisbane?

In Brisbane, in September, the average high-temperature is 22.9°C (73.2°F), and the average low-temperature is 15.3°C (59.5°F).

What is the average humidity in September in Brisbane?

The average relative humidity in September in Brisbane is 69%.

How many days does it rain in September in Brisbane?

In Brisbane, in September, it is raining for 11.5 days, with typically 26mm (1.02") of accumulated precipitation.

What is the driest month in Brisbane?

September is the month with the least rainfall in Brisbane. Rain falls for 11.5 days and accumulates 26mm (1.02") of precipitation.

What is the water temperature in September in Brisbane?

In September, the average sea temperature in Brisbane, Australia, is 22°C (71.6°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22°C (71.6°F) water.

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

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

How many hours of sunshine does Brisbane have in September?

The average sunshine in September in Brisbane is 8.8h.

What is the UV index reading in September in Brisbane?

The average daily maximum UV index in September in Brisbane, Australia, is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.
Average temperature in September - Brisbane, Australia
  • Average high temperature in September: 22.9°C

The warmest month (with the highest average high temperature) is January (28.1°C).
The month with the lowest average high temperature is July (19.4°C).

  • Average low temperature in September: 15.3°C

The month with the highest average low temperature is January (22.1°C).
The coldest month (with the lowest average low temperature) is July (12.7°C).

Average humidity in September - Brisbane, Australia
  • Average humidity in September: 69%

Months with the highest relative humidity are February and March (77%).
The month with the lowest relative humidity is August (68%).

Average rainfall in September - Brisbane, Australia
  • Average rainfall in September: 26mm

The wettest month (with the highest rainfall) is March (89mm).
The driest month (with the lowest rainfall) is September (26mm).

Average rainfall days in September - Brisbane, Australia
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is March (20.1 days).
The month with the lowest number of rainy days is August (9.5 days).

Average sea temperature in September - Brisbane, Australia
  • Average sea temperature in September: 22°C

The best month for swimming (with the highest average sea temperature) is February (27°C).
Coldest months (with the lowest average sea temperature) are July and August (21°C).

Average daylight in September / Average sunshine in September - Brisbane, Australia
  • Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 13.9h).
The month with shortest days is June (Average daylight: 10.4h).

  • Average sunshine in September: 8.8h

The month with most sunshine is November (Average sunshine: 10.6h).
The month with least sunshine is June (Average sunshine: 6.2h).

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

Months with the highest UV index are January, February, March, October, November and December (UV index 6).
The month with the lowest UV index is June (UV index 4).