Visiting local bars in Samut Songkhram is more fun when the weather is good. These rainfall averages and temperatures can help you decide the best time for bar-hopping. The hottest months are usually April and May, with an average temperature of 30°C, while the coldest months are December and January, with an average of 27°C. The rainiest months in Samut Songkhram are September, October, May and July, with each month seeing an average of 201 mm of rainfall.