The desert is usually not humid unless it happens to be during
the rainy season. I live in the desert and yesterday our humidity
was 2% with a dewpoint of minus 26 degrees F. That is about as dry
as one can find.
Monsoons actually help India become humid in the monsoon season.
i think that during this season it is a little cooler than in the
summer(unless, of course, you are in the forests and such.) during
the summer, it is very hot.
The climate is hot and humid all year round, divided into a dry
season (November to April) and a rainy season (May to October). The
dry season is the busiest and prices are higher at this time.
September to October is hurricane season.