Sorry, I should have clarified I meant when it's hot, which I think was what OP meant in the context of AC. When I meant dry, is that when it's hot (like the 35+°C), it's dry, not that it's never humid. Entire days with 30+ and 100% humidity pretty much never happens in Europe.

For instance, Bilbao is quite humid right now (about 80%), but max temps are in the 25°C. Madrid is expected to reach 39°C today, but humidity is about 30%.