I was at Disney the last 2 years the 1st week of May and while it was hot, it wasn't too humid at all....which makes all the difference to me!....last year it
was mid-80's to low 90's the whole week, but the humidity was low...our worst day was at AK, it was really hot and a bit more humid than the other parks. As for bugs, I honestly didn't notice any last year.
My friend is actually in Orland right now, but not at Disney, she called me
earlier this morning and said the weather is GORGEOUS, 83 and sunny.