Melbourne weather is so on again off again. Within the same day it can be sunny/warm and then a few hours later it will be cloudy and chilly.... and then nice again a few hours later. It makes it tough to dress for. You never know if it will be chilly, raining, sunny, windy. You'll see alot of Melbournians dressed in layers. Some are so used to it that they just tough it out and wear one layer and deal with whatever weather conditions come their way.
The clouds above are a perfect example. When I went to work in the morning it was bright and sunny with a light breeze. Now, it's lunch time and it's gloomy and extremely windy.