99 actual/ "feels like" 101 probably doesn't make much of a difference. But "99F, thanks to humidity and no wind, feels like 110, because you can't even breathe" might
Then say it is is 99 degrees and 90% humidity. I'm smart enough to know that means it isn't just hot, but DAYUM hot!
I'll make my point about "feels like" another way: Masturbation may FEEL LIKE vaginal sex, but it aint!