The tropical southern region of Thailand has two seasons: wet and dry. The further south you go the shorter the dry season. These seasons do not run at the same time on both the east and west side of the southern peninsular. On the west coast the southwest monsoon brings rain and storms between April and October, whilst on the east coast the most rain falls from September through to December. Temperatures are more even year-round in the south and do not drop much at night. The rainy season rarely brings things to a complete halt and is no reason to put off a visit to Thailand.