Planning for the weather is an important factor for making your trip to Ixtapan de la Sal a success, especially when you’re splurging. The hottest months are usually April and May, with an average temperature of 22°C, while the coldest months are January and December, with an average of 19°C. The rainiest months in Ixtapan de la Sal are September, June, August and July, with each month seeing an average of 310 mm of rainfall.