The rain can help to improve the fishing for snook. The low light conditions and higher water levels can definitely help anglers catch more fish in the backwaters. Some anglers report having good success in the shallows right after a hard, cool rain. This can help bring the water temperature down a couple degrees or more and a small increase in oxygen, which can help turn on the bite. If you don’t mind fishing in the rain, a steady rain with no lightning and no thunder can be very effective especially if you are fishing during a tidal change.