My house is 71 in the day and 63 at night in the winter, and they sprout at those temps okay. In the summer my house might get up to 90 in the day, but cools off to 60’s at night, and that seems to work okay too. I think at 83 they will just sprouted faster, and be ready sooner. Maybe when you rinse them use cold water. I’ve started using cold water every time I rinse them because it never seemed to matter, and right now my water is ice cold.
Edit: Of course it’s very dry where I live, so if it’s very humid, that might be more of a problem.