Weather
The Thais divide the year into three seasons: the cool season, hot season, and rainy season. For most westerners, this translates to "hot," "really hot," and "really hot and wet." High temperatures rarely drop below 25° C (70° F).
Historical Weather Patterns for Trang
In the lead-up to the wet season, day-time temperatures can get quite hot, although it still cools off considerably at night. November and December are the coolest months, although November can still be quite wet.
Rains begin in earnest in April or May, and continue until November. Although the rainy season is generally not a bad time to visit Thailand, the seas can get quite rough in the rainy season, and so ferry services often shut down from May to October. If you plan to visit any of the islands around Trang, make sure the resorts are open and the ferry services in operation.