Sydney weather in September 2025

Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Sydney in September. Check more long-term weather averages for Sydney in September before you book your next holiday to New South Wales in 2025/2026.

  • 20°C maximum daytime temperature in September in Sydney20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Sydney10
    10 days with some rainfall
  • 11°C minimum night-time temperature in September in Sydney11
    11°C min night temperature
  • 12 hours of daylight per day in September in Sydney12
    12 hours of daylight per day
  • No heat & humidity in September in Sydney0
    No heat & humidity
  • 62 mm monthly rainfall in September in Sydney62
    62 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Sydney5
    5 (Moderate) UV index
  • 18°C sea temperature in September in Sydney18
    18°C sea temperature

More about Sydney

Sydney by month

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

Recommended for New South Wales

  • Explore latest sale offers on holidays in 2024/2025
  • Filter deals by continent, star rating & holiday type
  • Including Dubai, Caribbean, North America, Asia & Pacific

TravelbagHoliday deal finder

The September weather guide for New South Wales (Sydney) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about Australia

How hot is it in Sydney in September?

Daytime temperatures usually reach 20°C in Sydney in September, falling to 11°C at night.

How sunny is it in Sydney in September?

There are normally 7 hours of bright sunshine each day in Sydney in September - that's 62% of daylight hours.

How warm is the sea around Sydney in September?

The average sea temperature around Sydney in September is 18°C.

Does it rain in Sydney in September?

There are usually 10 days with some rain in Sydney in September and the average monthly rainfall is 62mm.

Sydney September sunrise & sunset times

Browse the sunrise and sunset times for Sydney in September 2025. Select a month to view Sydney sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:14 17:37
Monday, 15th September 2025 05:55 17:47
Tuesday, 30th September 2025 05:34 17:57

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^