6 AM MDT, Monday, September 17, 2018
Some clouds and cooler weather should move into the Front Range region as early as Wednesday, certainly by Thursday. But there is very little chance for rain at any one location.
For today and tomorrow the high temperatures are likely to be near record. For Denver the record highs Monday and Tuesday are 95 and 93, and in Boulder it is 93 both days. Boulder did already set a record of 93 on Saturday, eclipsing 92 from 1948. So summer is hanging in there for another few days, and nothing dramatically cold or wet is in the near future.