Weather is probably a major factor when you plan your trip to Tlachichuca, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 19°C, while the coldest months are January and December, with an average of 14°C. The rainiest months in Tlachichuca are June, May, April and September, with each month seeing an average of 286 mm of rainfall.