Planning for the weather is a good way to make your trip to Tlajomulco de Zúñiga relaxing and enjoyable, especially when you’re splurging. The hottest months are usually May and April, with an average temperature of 23°C, while the coldest months are January and December, with an average of 18°C. The rainiest months in Tlajomulco de Zúñiga are July, August, September and June, with each month seeing an average of 182 mm of rainfall.