Weather is probably a major factor when you plan your trip to Saraburi, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 86°F, while the coldest months are December and January with an average of 79°F. The rainiest months in Saraburi are September, August, July, and October, with each month seeing an average of 9 inches of rainfall.