Bring a jacket to the track on Friday and Saturday, as both days will start out quite chilly, with temperatures in the 40s around sunrise. Under abundant sunshine, temperatures will rise into the mid 60s on Friday, and upper 60s on Saturday - great conditions to spend outdoors watching awesome racing.
Clouds will start to increase on Sunday due to an upper level disturbance that will be west of the region. High clouds will build through the day, but any rain with this system is expected to hold off until after sunset. I am still mentioning just a slight chance of showers on Sunday in case they arrive a little earlier, but I don't expect any impacts on the racing.