Climate averages 1991–2020
Darwin weather
in September.
A hot, fairly dry month: the joint 2nd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Darwin: daytime highs average 33.1°C and nights cool to about 22.9°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 16 mm of rain on roughly 4 days, which makes September a fairly dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 01 min on an average September day.
The nearest other city in this atlas is Dili (721 km away). In September its highs average 32.0°C, 1.2°C cooler than Darwin, with 20 mm of rain.
Among the 32 cities listed in Australia, Darwin ranks 1st of 32 for the warmest September highs and joint 3rd of 32 for the driest September (rainfall, lowest first). The mean September high of those 32 cities is 20.0°C; Darwin is 13.1°C warmer than that mean.
From September to October, average highs rise by 0.7°C to 33.8°C, and monthly rainfall rises from 16 mm to 76 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Darwin climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.4°C25.6°C | 25.6°C | 438 | 27.7 | 12.813 h |
| February | 30.2°C25.4°C | 25.4°C | 379 | 25.8 | 12.513 h |
| March | 30.9°C25.0°C | 25.0°C | 300 | 24.2 | 12.212 h |
| April | 31.8°C24.3°C | 24.3°C | 100 | 10.0 | 11.812 h |
| May | 31.5°C22.7°C | 22.7°C | 14 | 2.4 | 11.512 h |
| June | 30.4°C20.5°C | 20.5°C | 1.8 | 0.3 | 11.411 h |
| July | 30.4°C19.7°C | 19.7°C | 0.9 | 0.2 | 11.511 h |
| August | 31.3°C20.1°C | 20.1°C | 1.7 | 0.5 | 11.712 h |
| September, selected | 33.1°C22.9°C | 22.9°C | 16 | 3.7 | 12.012 h |
| October | 33.8°C24.8°C | 24.8°C | 76 | 11.1 | 12.412 h |
| November | 33.1°C25.8°C | 25.8°C | 180 | 20.7 | 12.713 h |
| December | 31.6°C25.9°C | 25.9°C | 323 | 24.9 | 12.813 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Darwin) is explained once on the Darwin year overview and on the Sources, method and limits page.