The original post: /r/askscience by /u/dooge8 on 2024-10-22 15:08:08.

Settle this one for me. I play baseball and softball and every time it’s humid out my teammates complain that that the ball isn’t carrying as far because of the relative humidity. I try, without sounding pedantic, to tell them that water vapor is lighter than air and theoretically the ball should travel the same or more when the air is humid vs dry air.

Let’s say we’re at sea level for both examples of 100% humidity or 0% or whatever a better condition might be.

Maybe I’m wrong about it as I have zero expertise here but eager to hear if anyone has the actual science.