ORD got to 93 today. The HRRR was a little too warm, even through today's 15z run, so that may be something to keep in mind.
There will be a bit of warming aloft tomorrow (by roughly 2C at 850 mb), which should allow for a high temp that is about 4 degrees warmer than today. So that would put tomorrow's high at 97 or so.
High was 86F today at the airport and my house! 6F warmer than the forecast high of 80F. Perfect summer day with slighty humid conditions and beautiful monsoonal clouds