Currently, the best thing I've found (as I mentioned on the other thread) is Taya Buriti Nut Oil Conditioner + Tigi Bedhead Headrush Shine Spray (once totally dry).
Also, let it dry naturally, as much as possible (overnight, if you're someone who isn't too restless in bed!) and learn to embrace your (probably beautiful) natural waves/curls.
I know they say don't go to bed with wet hair (and I would agree with that), but I have never had a problem with going to bed with slightly damp hair (loose, not wrapped in a towel) and even if it's not exactly ideal, it's still going to be considerably better for hair than heatstyling is.
The more you heat style it, the more you damage it, so the more it frizzes in the rain/humidity, so the more you then have to heat style it...
It's a vicious circle.
Whereas, the less you heat style it, the better it looks naturally and the less it frizzes in the rain/humidity, so the less you feel the need to heat style it...