In Melbourne, first rule to live happily here is don't trust the weather. Though you perceive the outside is full of sunshine and little bit of clouds here and there, expect it to be changed within an hour or so. Four seasons in a day - famous term around local people here. Within a day, you could feel freezing bitterly cold and went to the another extreme of totally sweating hot. The rule - don't trust the weather :D
Quoting from my friends
"if the Melbourne's weather is a person, I would diagnosed him as having Multiple Personality Disorder"True indeed.