Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Tap and hold on a clear space on your home screen and select widget. Scroll to clock and tap on it. There are several clocks available. including the one you have lost that contains the weather.

Dear Sir, I have the same problem. I tried what you advise but the only option that is available is a analog clock that I really don't like. Is there a way to get the original weather/clock back? I thank you in advance.

Tap and hold on a clear space on your home screen and select widget. Scroll to clock and tap on it. There are several clocks available. including the one you have lost that contains the weather.
I also have lost my clock from the home screen and am unable to find it. When I follow the quoted directions there are no clocks in the widgets list. I tried the 'Browse all HTC widgets' option and get a message telling me the app 'Rosie Utility' has stopped unexpectedly and to please try again. When I go to the list of apps and look for Rosie Utility it is there but the only lit button is the 'Clear data' button (it has 40.00 KB of data). Any clues or hints?
edit: I'm running a Desire S running Android 2.3.5
