I read that March is the least-humid month in Miami, where it peaks at 82% in the morning and drops "all the way down" to 56% by the evening. I'm not going to get into a pissing match with Miss Margaret over how relatively uncomfortable Melbourne is v. Miami, but I'm with
@tented: at their worst, places like Miami, (or New Orleans, where I lived) can be like walking through soup. In the lights at night, sometimes you can see the water in the air, even when it's not raining. Suffice it to say, the AO and Miami are two of the more oppressive tournaments for heat and humidity. Acapulco looked brutal this year, and Cincy and the USO can be pretty bad, depending on the day. Maybe Rio? I wonder what are the worst ATP tournaments for heat and humidity.
For myself, I like heat and humidity. (I know people rarely say that.) I certainly love a hot, dry day. You can keep the cold. Happy Spring, to those of us in the Northern Hemisphere, btw!