Note that WeatherBug was recently updated and now gives you more control (total control) over its use of GPS, auto updates to the icon info, and other battery consuming tasks.

I had deleted it several beta versions back because my battery would be gone in less than one day. This version seems to hardly impact the battery (no GPS use and only hourly updates).

I have not experienced any problems with memory but I do exit the application when I'm done using it so its not running in the background.