If the unit has various temp settings this could be normal if you are on a low temp setting.

If unit used to run different at this temp setting then odds are high that you have an air flow problem.
1. Clean and check your vent system.
2. Clean and check the blower wheel.
3. Check the lint filter some fabric softeners can coat the screen and greatly reduce air flow. Clean with soap and water.
4. Check that the drum seals are OK.

If the vent is a pain to check (up through the roof etc.) try this first.

Undo the dryer from the exhaust
Run a load
If the load dries correctly then you have a vent problem.
Clean/check the vent system. Make sure the outside louvers open fully.

If you do not want lint in the house.
Take a pair of pantyhose, put one leg into the other and attach this to the dryer exhaust.
Leave enough room behind the dryer so it can blow out like a windsock.
Run a load.

Both the above will allow you to check the air flow and temp.
Also the above is NOT recommended for a gas dryer due to possible carbon monoxide problem