What should my baby corn snakes tank temperature be?

The average temperature for a corn snake tank should be between 75-85 F. At night, it can drop to the lower end of that range, but it shouldn't get to 66. Thats too cold. Your snake doesnt need a heat lamp if you keep it by the window with the blinds open. That is a good temperature or him. And remember, its ok that it drops at night. That's perfectly fine. Also, 4 pinkies is a little much in one session. My juvie corns (there are 5 of them) eat about 1 each week, and are starting to be moved to 2(sometimes 3) every two weeks.