I am planning a trip to Perth at the beginning of May to visit my brother who just recently moved there. I know it will be Autum there and have been told that May is the beginning of the rainy season. Can anyone tell me if the rain usually begins at the beginning of the month? I just dont want to be stuck inside the entire time I'm there visiting. Also any tips on things to do or must see things while I'm there would be greatly appreciated. Thanks!!