bad idle or overheating after stopping?

[Herman]

My temp gauge reaches :
:
:
:_____________________
:
:

...... After 10 mins driving and stays there, no matter what ..... after 570 miles in three days , 460 of them in 24 hours, I wonder is the needle stuck or is my cooling system really neat?

Needle stays round the middle between 75 and ~100 degrees or so.(someone will correct if wrong)
Done not to alarm the driver when temperature fluctuates

It's not a real representation of the actual temperature