As we head into the second half of August, average temperatures are dropping, with only one more week where the average temperature will be 80 or above. That said, we can still have very warm days — 100 degree weather in September is not unheard of — but is rare. September 9, 2016 was 89 degrees. Sunset times have already started to come much earlier, 33 minutes earlier then late June — and will only continue to get earlier.