The Australian Bureau of Meteorology has recently made changes to its website. As a result, the current version (1.0.2) of this widget no longer works, at least for some locations. We hope to have an updated version available in the near future.
In the meantime, you can use version 2.3 of the Degrees Down Under application, which has been updated to accommodate the website changes. It also adds an option to display "apparent" temperature, which was introduced to the Bureau of Meteorology's website as part of the recent changes.