The best time to go to Acatlán is typically during the dry season, from October to May, with the shoulder months of October and November, and April and May offering particularly pleasant conditions.
During these months, you'll experience comfortable temperatures and significantly less rainfall, making it ideal for exploring the town and surrounding areas. The days are generally sunny, great for outdoor activities and enjoying the local culture without the interruption of heavy downpours.
For those planning to attend local festivals or events, late October and early November coincide with Día de Muertos celebrations, which are an important cultural experience in Mexico. Similarly, Easter (Semana Santa), which usually falls in March or April, is a significant time in Acatlán with various traditions. If you're keen on experiencing these cultural highlights, these specific periods within the dry season are excellent choices.
While December to February is also part of the dry season, it can be a bit cooler, especially in the evenings, so you might want to pack some warmer layers.