I definitely notice a difference in our lower humidity days and higher humidity days were the temps are the same. When the humidity is high it reminds me of trying to exert myself at altitude, you can't breath as well. Plus your sweat doesn't cool you are well because it doesn't evaporate as much. I agree both 100 degrees with humidity and without are bad but I still feel (and DH has said the same) it is harder when the humidity starts getting high.

As a native Texan I used to chuckle at people complaining about the heat but the past two summers it has worn on me. I like having mild winters but we have had record hot summers the past two years and it does make even those of us who love Texas whine.

36 days of 100+ and it isn't even August yet, last year we had a close to record at 50 days. Sometimes we pay for our 300 rain free days a year.