The peak tourist season is between december and April. Puerto Rico's climate is the most pleasent in the world,with an average temperature of 83 degrees Fahrenheit in winter,and 85 degrees in the summer with year round pleasent breezes. In the mountains ,it's about 10 degrees coolerduring both summer and winter. Average annual rainfall is about 52 inches. The rainy season is at the peak in August and the average monyhtly rainfall is 7 inches.
Hurricanes happen once in a while,are very rare.
Hurricane season is troughout May and December. As you can see,Puerto Rico is a great place to go and visit, but does have its disadvantages.