If a hot attic is making your house hot, then you need additional sealing between the attic and the house, or additional insulation on the floor of your attic.

If a hot attic is making your house hot, then you need additional sealing between the attic and the house, or additional insulation on the floor of your attic. Attic spaces are normally vented so that they are kept at outside temperatures. In the winter, attics are regularly 30 degrees below the inside temperature. A 20 degree difference in the summer shouldn't be a big deal. That said, plenty of people will sell you attic fans or other gizmos to moderate attic temperatures if you don't want to fix the insulation/sealing problems. Whole house fans do help a lot in pulling cooler outside air into the inhabited spaces.