Planning for the weather is an important factor for making your trip to Nakhon Pathom a success, especially when you’re splurging. The hottest months are usually April and March, 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 Nakhon Pathom are September, October, August and May, with each month seeing an average of 220 mm of rainfall.