You can plan your beach trip with a look at year-round temperatures in Nongbua Lamphu: 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 24°C. The rainiest months in Nongbua Lamphu are August, July, September and May, with each month seeing an average of 316 mm of rainfall.