Weather is only one factor, but it can really affect your travel plans, especially when you're planning an extended stay in Juanjuí. The hottest months are usually September and August with an average temp of 77°F, while the coldest months are July and June with an average of 76°F. The rainiest months in Juanjuí are March, February, April, and January, with each month seeing an average of 13 inches of rainfall.