Townsville is in the sub tropics and often had 15-16C minimums in "winter" .
We used to laugh as those minimums for Townsville were maximum temps for Melbourne.
I tell ya' its all this daylight saving is at fault. the extra hour of sunlight is heating the country up. LOL
A friend in Estonia has informed me that the country is also having 30C quite frequently lately. That temp is rare in that country.
Cheers