Those are normal temperatures McKinsey

For snakes with respiratory problems, keeping the temperatures between 95-96 on the warm side and 86-87 on the cool side with about 65-70% humidity will really help their immune system fight the infection. It will also raise their metabolism so the medication works faster.

I wouldn't let the temperatures dip below 83-84 on the cool side if you can help it. They need to stay where it's heated and humidified or you'll very easily have a suffocating snake(they are unable to cough).