Verified answer

You can contact the customer care of HTC

http://www.htc.com/europe/CA_Hotline.aspx

http://www.htc.com/europe/CS_Mail.aspx

When you go to add the widget you have to go to the htc clock widget not the weather widget. Once you are in the clock widget you have to swipe over untill you get to that one. Hope that helps.