From the search tool, I found that others have had some trouble with a few of the custom tags not working. But it has been a while and although I saw it was attributed to Front Page (which I am using) I never saw what was done to get them working.
I can’t seem to get %daysTmax<0C% or %daysTmin<0C% working.
Here is the page in question: http://www.brobergs.us/Weather/wx2.html
Any suggestions?