Visiting local bars in Roi Et is better when you know what the weather holds. These rainfall averages and temperatures can help you determine the best time for bar-hopping. 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 25°C. The rainiest months in Roi Et are September, July, August and May, with each month seeing an average of 285 mm of rainfall.