Saw this over at Symbian Freak and thought there may be a few interested parties here...
It's a free widget and not only gives forecast information, it also provides satellite imagery and live camera feeds from the Weather station supplying the forecast.
It doesn't have auto update or screensaver capabilities like Handy Weather but it can be set to a active standby shortcut and more importantly - it's free!
Open your smartphone browser and head over to http://is.gd/got to get it.