It depends on where you are. The heatwave that Melbourne got last week, which I mentioned in this thread, is so unusual that it was the worst recorded heatwave in over a century. Normally, Melbourne weather is very mild and quite pleasant
, and this week is like that, with temperatures reaching the low 20s every day. Perth, on the other hand, where I spent my first 30 years, is stinking hot every Summer, which is one reason I don't miss it. Perth is only slightly more northern in latitude than Melbourne, but its geography just encourages hotter weather, whereas Melbourne's proximity to Port Philip Bay gives it its typical changeable but mild weather.