You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually April and March with an average temp of 85°F, while the coldest months are December and January with an average of 77°F. The rainiest months in Nakhon Ratchasima are September, August, October, and July, with each month seeing an average of 9 inches of rainfall.