Don't worry. Download and install om weather widget and put the widget on your desktop. Then tap the top right of the screen, to bring up the "spanner" settings icon and go to "widget style". Now choose the little box on the far right and a longer box to the right of that should appear saying "edit custom layout". This is where you will find some extra settings. Play around with these until you get it looking how you want it. Note that there are also some extra weather icon themes in the repos to change the look further.