Weather is probably a major factor when you plan your trip to Sakon Nakhon, but bear 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 temperature of 29°C, while the coldest months are January and December, with an average of 23°C. The rainiest months in Sakon Nakhon are August, July, September and May, with each month seeing an average of 364 mm of rainfall.