Okay, let's go back to the basics. Check coolant strength (buy $5 tester from autoparts store). Then check the temperature gauge.
Finally, the "Fall Back". Technically, anything in between the two lines of N O R M A L , is considered acceptable.
Edit. Recently, there was a thread on zetec running hotter than others.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1030406&page=&view=&sb=5&o=&fpart=all&vc=1 
