I like 350F but it does not have to be exact. Try to keep the grill under 400F so you don’t end up with chicken that is burnt on the outside and raw on the inside.
Let the cooking grates warm up for at least 10 minutes. Giving the grates time to warm up is one way to help make sure that the chicken doesn’t stick to the grates.
The legs are technically “done” when they reach an internal temperature of 165F. However, don't stop grilling at 165F because the meat will still be tough and not fun to eat.
You want an internal temperature of around 185F. An easy way to tell when the meat is tender is to wait until the skin bursts open as the meat swells and splits things open.
Sweet sauces go great with chicken legs.My chicken leg sauce of choice these days is Sweet Baby Ray’s Sweet Red Chili. It gives the legs a beautiful shine and tastes great.