Planning for the weather is an important factor for making your trip to Nonthaburi 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 January and December, with an average of 28°C. The rainiest months in Nonthaburi are September, October, August and July, with each month seeing an average of 231 mm of rainfall.