Visiting local bars in Tachilek is more fun 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 27°C, while the coldest months are January and December, with an average of 20°C. The rainiest months in Tachilek are August, July, September and June, with each month seeing an average of 318 mm of rainfall.