If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Bang Saphan Noi: The hottest months are usually April and May, with an average temperature of 28°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Bang Saphan Noi are October, September, July and November, with each month seeing an average of 220 mm of rainfall.