This is a question for the road course track folks. At what temperature does a dry track day just become an exercise in learning the lowered traction limits of the car and the typical "casual" HPDE drivers say that it is not worth it, from experience ? My idea of fun on the track is driving fast and having fun in the safest environment. I don't like driving when it is wet; but, if I'm already there when it rains or sprinkles, I'll take advantage of that. It is a big production for me to get to a "fun, safe" track, and if it really is going to be a low traction event because of temperature, I can just wait a while. All my track days have generally been above 80°F.