So, if you are so newbie as i was a minute ago than this should help you if you have problem with weather shower.. which shows not your town as current while you are in other town.
1. Anyways all you need to do is to remove weather and time widget from desktop.
2. Press "+" to add widget
3. Add time widget which you like
4. It should ask you about City selection, after you selected Clock design.
5. Select your town
6. Add weather widget.
Solution was fount here ( post by Marshal ): http://androidforums.com/htc-hero/8157-current-city-issues.html