hi there,
May through October is Cuba's rainy season and it tends to get a little warmer on average, and July and August are certainly the hottest months.
Traveling during the rainy season also means avoiding the crowds and saving money, not only on
accommodations, but also on things like
rental cars and tours.
Take into account that there can be long periods of rain during the rainy season and Cuba's hurricane season lasts roughly from late summer through fall.