Darwin weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: April – September
What is the weather like in Darwin in September?
In September, Darwin is very hot: daytime highs average 33 °C, and even at night it stays warm at around 23 °C. The sea averages 28.1 °C – lovely and warm for swimming. With around 10 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 19 mm in total. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is an excellent month for a holiday in Darwin.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 97 | 89 | 74 |
| Day | 32° | 33° | 34° |
| Night | 20° | 23° | 25° |
| Sea | 26° | 28° | 30° |
| Sun | 11 h | 10 h | 10 h |
| Rain days | 1 | 4 | 12 |
More details for September
- Daylight
- 12 h 1 min06:42 – 18:42
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 22 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 39 %on averageAll months
- Hot days
- 30 days30 °C or moreAll months
- Time zone
- UTC+9:30Australia/Darwin
How the score comes together
- Temperatureweight 35 %69 %
- Seaweight 25 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
Darwin in September: quick answers
Is Darwin hot in September?
Yes. In September, Darwin is very hot: daytime highs average 33 °C and nights stay around 23 °C. On about 30 days the thermometer climbs to 30 °C or more.
Can you swim in Darwin in September?
Yes. In September the sea averages 28.1 °C – lovely and warm for swimming.
Does it rain much in Darwin in September?
Rain is rare: about 4 days bring 19 mm in total.
Darwin month by month
The whole year in DarwinAll destinations: AustraliaWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences