Weather in Adelaide in September 2025
Average weather
Average temperature in Adelaide in September
The temperature in September is +21°C on average, with a range between a maximum of +30°C during the day and a minimum of +4°C at night.
The average maximum temperature goes up 54% by the end of the month, compared with the beginning of the month, from +16°C to +30°C.
Is Adelaide warm or cold in September?
Adelaide is typically mild in September.
Maximum temperatures go up compared to the previous month from +15°C to +18°C. The minimum temperature also goes up from +9°C to +10°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Adelaide:
Climate in Adelaide in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +15°C | +18°C | +21°C | ||||
| Min. temperature | ||||||
| +1°C | +3°C | +4°C | ||||
| Max. temperature | ||||||
| +28°C | +31°C | +36°C | ||||
| Rainfall | ||||||
| 67 mm | 60 mm | 42 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Humidity | ||||||
| 77% | 73% | 69% | ||||
| Air pressure | ||||||
| 1018 HPa | 1017 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 6 | 8 | 10 | ||||
| Cloudy days | ||||||
| 8 | 8 | 9 | ||||
| Rainy days | ||||||
| 17 | 14 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September often has better weather than August. It’s getting warmer as September arrives. The average maximum temperature goes up from +15°C to +18°C during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 67 mm to 60 mm. It feels drier, as humidity decreases from 77% to 73%. The average wind speed doesn’t change much during September, staying around 4 m/s. The good news is there are likely to be more sunny days in September, from 6 to 8.
October brings much the same weather, it remains good.
Wind
The average wind speed is 4 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Adelaide is gradually increasing during September, going from 2 m/s to 5 m/s over the course of the month.
Rain
How was the weather last September in Adelaide?
Climate Change over Years
The climate in Adelaide in September has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+20°C) and the highest in 2007 (+22°C). The driest year was 1982 with only 298 mm of rainfall, and the wettest year was 2020 with 1368 mm.
FAQ
Is September a good time to visit Adelaide?
Can you sunbathe in Adelaide in September?
Is Adelaide rainy in September?
Is it sunny in Adelaide in September?
Other cities in Australia
Monthly weather in Adelaide
Source of the data
For this page, we’ve looked at the typical weather in Adelaide, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.