Thailand: Weather & when to go: May
After the high temperatures of April, May starts to see things cool down a bit, but not as much as some would hope. Highs in the mid 30s are still a reality and rainfall becomes more common throughout the country. While the rains are more prevalent, May is still a great time to visit the country, particularly in certain southern regions of the country.
In the north and central regions of the country, temperatures slowly start to decrease with the more common rains. The Khao Sok area during May is particularly warm and wet, with high humidity, which can make for great wildlife viewing. Farther south, there is a high chance of rain along the Andaman beaches of Phuket and Krabi, while more northern beach escapes (Hua Hin and Cha Am) can still guarantee sunseekers plenty of rain free days. Similarly, on the Gulf side, the islands of Koh Samui and Koh Phangan enjoy more rain-free days than their counterparts on the other side of the peninsula.