September weather - Spring 2024

Weather in September
Frequently asked questions
Average temperature in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average UV index in September

The landmarks of the city of Sydney, Australia

Weather in September

September marks the advent of spring in Sydney as temperatures hike and flora starts to flourish. Parks become attractive spots for picnics and leisurely strolls, taking advantage of the increasingly warm weather. A highlight is the minimal 68mm (2.68") of precipitation, making it the driest month in Sydney's weather cycle. Visitors and locals delve into various outdoor activities, relishing the sunny and dry conditions. Clearly, spring's allure is hard to resist in a city as magnificent as Sydney.

Temperature

In September, Sydney notes an average high-temperature of an agreeable 20°C (68°F), hardly different from the preceding month. Sydney temperatures generally rest at a low of 11.1°C (52°F) during the September nights.

Humidity

The average relative humidity in September in Sydney is 51%.

Rainfall

September is the month with the least rainfall. Rain falls for 10.5 days and accumulates 68mm (2.68") of precipitation.

Sea temperature

September is the month with the coldest seawater in Sydney, Australia, with an average sea temperature of 18.6°C (65.5°F).
Note: Swimming in water of 18.6°C (65.5°F) is not enjoyable for the majority of individuals. Breathing control becomes increasingly challenging as the temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

In September, the average length of the day is 11h and 53min.
On the first day of September in Sydney, sunrise is at 6:13 am and sunset at 5:37 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 5:57 pm AEST.

Sunshine

The months with the most sunshine in Sydney, Australia, are August through October and December, with an average of 7.9h of sunshine.

UV index

In Sydney, Australia, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum daily UV index of 5 during September morphs into the following directions:
Be vigilant - Preventing sunburn is recommended. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.

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Frequently asked questions

What is the temperature in September in Sydney?

During September, Sydney experiences an average high-temperature of 20°C (68°F) and a low-temperature of 11.1°C (52°F).

What is the average humidity in September in Sydney?

In September, the average relative humidity is 51%.

What is the driest month in Sydney?

September is the month with the least rainfall in Sydney, Australia. Rain falls for 10.5 days and accumulates 68mm (2.68") of precipitation.

How many days does it rain in September in Sydney?

In September, in Sydney, the rain falls for 10.5 days. Throughout September, 68mm (2.68") of precipitation is accumulated.

When is the sea coldest in Sydney?

With an average sea temperature of 18.6°C (65.5°F), September is the month with the coldest seawater in Sydney.

What is the sea water temperature in September in Sydney?

In September, the average sea temperature in Sydney is 18.6°C (65.5°F). Swimming in 18.6°C (65.5°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

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

In September, the average day length is 11h and 53min.

What time are sunrise and sunset in September in Sydney?

In September, on the first day of the month, sunrise is at 6:13 am and sunset at 5:37 pm. On the last day of the month, in Sydney, Australia, sunrise is at 5:33 am and sunset at 5:57 pm AEST.

What are the months with the most sunshine in Sydney?

August through October and December, with an average of 7.9h of sunshine, are months with the most sunshine in Sydney.

How long on average sun shines in September in Sydney?

In September, the average sunshine duration is 7.9h.

What is the UV index reading in September in Sydney?

In September, the average daily maximum UV index in Sydney, Australia, is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

17.8°C 64°F

20°C 68°F

22.1°C 71.8°F

Average low temperature

Average humidity

Average rainfall

Average rainfall days

10.4

10.5

11.6

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in September
Sydney, Australia

Average high temperature in September: 20°C

The warmest month (with the highest average high temperature) is January (25.9°C).
The month with the lowest average high temperature is July (16.3°C).

Average low temperature in September: 11.1°C

The month with the highest average low temperature is February (18.8°C).
The coldest month (with the lowest average low temperature) is July (8.1°C).

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Average humidity in September
Sydney, Australia

Average humidity in September: 51%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in September
Sydney, Australia

Average rainfall in September: 68.3mm

The wettest month (with the highest rainfall) is June (131.9mm).
The driest month (with the least rainfall) is September (68.3mm).

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Average rainfall days in September
Sydney, Australia

Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (10.4 days).

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Average sea temperature in September
Sydney, 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).

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Average daylight in September /
Average sunshine in September
Sydney, Australia

Average daylight in September: 11h and 5min

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: 7h and 5min

The months with the most sunshine are August, September, October and December (Average sunshine: 7h and 54min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).

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Average UV index in September
Sydney, Australia

Average UV index in September: 5

The months with the highest UV index are January and December (UV index 12).
The month with the lowest UV index is June (UV index 2).

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September weather forecast
Sydney, Australia

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