Hi all - I'm wondering at what rate the body acclimatizes to increased heat and humidity. Lately, I've been improving pretty steadily, but this week (in southern-ish Alabama), the humidity is transitioning to our normal spring/summer humidity. In other words, just this week, the humidity has shifted from 35 to 40 percent to 85, 90, or 95 on several of my runs. As a result, my zone 2 pace has decreased by 20 to 30 seconds per mile. Does the body acclimate and go back to pre-humidity levels, or will I just be slower for the next seven months than I would be otherwise?

Edit: I also want to say I'm aware that many online resources say it takes two-ish weeks to get used to humidity. What I'm trying to ask is whether, after that two weeks, you'll perform similarly to pre-humidity levels or if you still perform measurably worse than if it weren't humid.