In Which Months Do Hurricanes Mostly Occur?

About 99 percent of hurricanes occur during hurricane season, which runs from June 1 to November 30 in the Atlantic Ocean and May 15 to November 30 in the Pacific Ocean. In the Atlantic and Pacific, September is the month with the most hurricanes. During an average season, three hurricane-strength storms occur in September. Many hurricanes also form in August and October, but strong hurricanes seldom occur in November.