Sydney Weather in September

September in Sydney sees daytime temperatures around 20°C (68°F) and lows of 13°C (55°F) at night. As the driest month of the year, combined with perfect weather, it's a great time to visit.

Rainfall in Sydney in September

With the lowest rainfall figures of the year, conditions are ideal for exploring the outdoors. Typically around 10 days of rainfall are expected, averaging 53 mm (2.1 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Sydney in September

The perfect temperature in Sydney in September makes it a solid month to visit, with 20°C (68°F) during the day and 13°C (55°F) at night. Conditions are often most pleasant around the middle of the day. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Sydney in September

Expect sunny days throughout the month, with an estimated 234 hours of sunshine. This makes it a pleasant time to visit Sydney.

Wind Speed in Sydney in September

September has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.

Average water temperature in September

At 17°C (63°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, March, April, May, September, October, November and December typically offer the best weather for Sydney.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Sydney's climate page.

Sydney Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 20°C (68°F)  

Water Temperature 17°C (63°F)  

Chance of Rain 33%  

Precipitation 53 mm (2.1 in)  

Rainy days 10 days  

Humidity 50%  

Windspeed 3 m/s (6 knots)  

Sunshine 234 hours  

Percentage Sunshine 66%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Sydney typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 13°C (55°F).

Average temperatures in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Sydney in September

Browse day-by-day weather records for Sydney spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Sydney historical weather extremes in September

Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Sydney.

• On September 19, 2023, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
• The coldest September day was on September 25, 1976, with a maximum of 13°C (55°F).
• Sydney registered its coldest September night on September 13, 1984, with temperatures dropping to 1°C (34°F).

What to Wear in Sydney in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. The water temperature sits at about 17°C (63°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Sydney in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Sydney's climate page.

More climate data for Sydney

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Sydney climate overview or explore weather in Australia.