It got up to 96 F here yesterday with high humidity, and the same is expected today. It was so humid that my cycling shorts and jersey were drenched when I got to work in the morning and did not dry out hanging in my air-conditioned office all day from 7 am to 4:30 pm. This morning didn't feel quite as bad, but that might have been because I rode easier. I rode at 16.5 mph pace in yesterday morning but dialed it back to less than 15 mph on the ride home when the temp was in the mid-90s. No use getting a heat stroke.
My last 6 bike commutes have been on days when the high temperature topped 90 F with high humidity. This is August weather.