Not a joke but got a bit worried. Garage that does my tyres and brake pads said they are very hot way over average. After a while in use they start to grind which should not happen.
Garage is trying to rip you off and scare you into having work done that's not needed.
There is no 'normal' temperature, the more you use them the hotter they get. If they didn't get hot, they wouldn't stop you as it's the transfer of kinetic energy through friction into heat that stops you.
If they are grinding a bit, check there isnt grit stuck between the inside rim and caliper,check to make sure the correct pads are fitted, and check they are seated properly, also check the caliper and disk backing plate, they are thin and sometimes a stone or rock will knock and bend it making it touch the inside wheel or disk.
But if a garage says, your brakes are getting hotter than normal...go back and ask them to check the indicator fluid, the oil plug gaps, and check to make sure the electrons in your wires are all topped up, and your tire coolant levels are legal...cowboy alert..