“This was more than 10 degrees above average for August and close to Adelaide’s mean maximum temperature in December, which is 26.9 degrees,” Weatherzone meteorologist Ben Domensino said.
The weather reporting service said temperatures ballooned across the state due to an unusually warm air mass.
In some places, temperatures were 11 to 12 degrees higher than average.
Tarcoola, in the state’s north, recorded a temperature of 33.4 degrees, its hottest day since 2009.
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But things are set to cool down today with south-westerly winds across the state, Weatherzone reported.
Temperatures are set to drop by about 10 degrees statewide from yesterday, with the capital set to only reach a top of 16 degrees.