The climate of the Dominican Republic is tropical, therefore hot and humid. Temperatures fluctuate between 25 and 30 degrees throughout the year. The peak of heat is in summer around the month of August while the mildest month is January (with 20°C all the same, at night). The weather is normally good enough to visit at any time of the year. From the beginning of June to the end of October we are in the cyclone season but that does not mean that you will necessarily have bad weather at this time of the year. Some years we don't even have rain between these dates! There can be storms and exceptionally a tropical depression or a cyclone which generally take 2 or 3 days to move away. Normally May and October are known to be the rainiest months, but again, nothing very specific... It's not a monsoon like in Asia. You should also know that the north coast (Atlantic coast) is much rainier than the south coast (Caribbean side). In Bayahibe and Saona it rarely rains and when it does it generally only lasts a few minutes and the sun returns almost immediately.