Trang a tropical climate. Temperatures don't vary a lot throughout the year although the pre-monsoon months from February to April are a little hotter. The year is divided into a dry season, from January to March and a long wet season from April to December, with the strongest rains in September.
The best time to come to Trang is from December to March knowing that during the low season from May to the end of October, when it rains the most, tourism activity is very limited and most of the resorts on Trang islands are closed.
See weather forecast in Trang