How many more sunny days are there in May than in September?

(1) May is the least sunny, and September is the most cloudy.

(2) The cloudy days in September are two days less than those in May, and the sunny days are three days more than those in September.

(3) May has 365,438+0 days, including 6 rainy days.

(4) There are 30 days in September, including 22 days when it doesn't rain.

So the answers are: sunny, cloudy, 2,3,31,6,30,22.