If you're an Australian user of Rainmeter you'll know that most weather meters are pretty useless, usually running off the inaccurate Yahoo Weather service.
Rainmeter user haicim (in his post here) has made a meter using an Australian BOM feed. I've taken the liberty of tweaking it and fixing a few bugs.
It works with the Gnometer skin, which you should have by default. If you dont you'll need to download an install that first. Once installed, download the 5 Day BOM meter below and edit the PAGEURL variable (line 17) for your state/city. Place the file in the gnometer weather meter directory (usually My Documents/Rainmeter/Skins/Gnometer/Weather). You can use the Gnometer settings control panel to adjust width, fonts, colours and transparency etc.