You might spend a lot of your holiday inside, but if you want to see more of the area, taking a look at local weather data can help you. The hottest months are usually April and March, with an average temperature of 31°C, while the coldest months are December and January, with an average of 26°C. The rainiest months in Lan Sak are September, August, July and October, with each month seeing an average of 250 mm of rainfall.