Reminds me of riding all those years in Hong Kong @Gandalf.....the amount of times I got caught in the monsoon season was ridiculous....and as you say riding in high humidity is no fun whatsoever...
Went to Brackley yesterday, it was wet. Ended up going in the car because of the forecast. What I missed most of all was my old ST4! I didn't mind getting that wet.
Happened to me and my friend in Sri Lanka we hired a trial bike to ride from columbo to Sinharaja to Hattan It was lovely and sunny to Ratnapura and it rained there then sunny and then poured getting to Hattan we stopped in a town and picked up waterproofs, the only thing that fitted me was lime green long coat ( I will see if I can find the pics ) we only had jeans and sweatshirts