Planning for the weather is an important factor for making your trip to Juanacatlán a success, especially when you're splurging. The hottest months are usually May and April with an average temp of 74°F, while the coldest months are January and December with an average of 65°F. The rainiest months in Juanacatlán are July, August, September, and June, with each month seeing an average of 7 inches of rainfall.