The best time to go to Rosario De La Frontera is during the autumn and spring months, specifically from March to May and September to November, when the weather is most pleasant for outdoor activities.
During these periods, you'll experience mild temperatures and less humidity, making it ideal for exploring the natural springs and the surrounding landscapes. The clear skies are superb for enjoying the views of the Lerma Valley and the nearby mountains.
Couples often find these seasons superb for a relaxing getaway, as the comfortable weather allows for leisurely walks, enjoying the thermal baths, and exploring the area's natural beauty without the extremes of summer heat or winter chill.