Humidity: mesh shirts? Other tips?

Mesh? Sure, but... You want to wear something 100% polyester/other synethetic materials. You can find these at running stores or sporting goods stores. If you don't want to go shirt less, high quality tops are better than just any old thing.

Its the dewpoint - not the relative humidity that matters btw for factoring how the humidity will effect runs. Relative humidity is a measure that farmers need to understand for their crops. For instance the humidity is 91% in Arcata, CA but I can guarantee anyone there is going to enjoy that weather more than wherever you're asking this from.

Things that help in hot/humid environments

Run when the uv index is at its lowest during the day - dawn and evening.

Utilize shade if possible - running in a forest is going to feel a lot less hard than running out in the open. Even shaded neighborhood streets can help a little.

Drink water every few miles.

Sometimes along a lake or ocean, you can get a breeze that helps cool you a little.

Alligator shirts let the breeze through, so sweat evaporates directly off the skin, cooling more.

sweat doesn't work in humid environments. The only real solution is to stop generating heat. Stay within your limits for sweatless cooling.

I run between 68-74F dew point. It's absolutely hell. A few things:

* Run in the dark before the sun comes out. Wake up very early.

* Freeze your water bottle or hydration pack. It de-ices while you run.

* Drink water if you wake up at night to pee. It helps to stay hydrated pre run.

Evaporative cooling will be ineffective, if not impossible. Pre-cooling can help for a while, like a chilly shower right before going out. An ice bandana for longer runs, as well as running shortish loops that bring you back to an ice chest or something where you can keep a soaked washcloth to wipe down with and get some cold fluids.

So remind me again why Americans have been rushing for 40 years to move to god forsaken southeastern states where it's f-cking boiling hot from April through late October every year.

Some of the best runs you'll ever experience can be had in the cold but it's virtually impossible to not be utterly miserable in steaming hot weather.

Especially in an era of increasing temperature and volatility, living in the southeast is goddam-ed nuts.

Because 99.75 percent of those people don’t exercise outside.

take that out of the equation and it makes a little more sense. although, I personally prefer 4 real seasons.

I'm old now, but grew up in Florida, if wearing a shirt, get the lightest tank top you can find. Hat is too hot, go with sunglasses but finding shade to run in helps more than any of the above. 60% humidity? Might as well be in AC relative to here at the moment. Just use the mantra, Oct. is not that far away, Oct. is not that far away...