Adelaide is typically mild in September.

Maximum temperatures go up compared to the previous month from +59°F to +64°F. The minimum temperature also goes up from +48°F to +50°F.

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:

September often has better weather than August. It’s getting warmer as September arrives. The average maximum temperature goes up from +59°F to +64°F 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 76% 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.

The climate in Adelaide in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1992 (+67°F) and the highest in 2024 (+72°F). The driest year was 1982 with only 298 mm of rainfall, and the wettest year was 2020 with 1368 mm.

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.