How can i fix my fan? corsa 1.4?

ok, basically i drive around for about 10 min,, not even reving the engine and the temperature goes all the way to 100 :S and then the fan belt comes on...
is that unusual?

on other cars ive seen the temperature guage always stays about in the middle and never goes to 100 even when red line their engine.. whats up with my car?