The best time to go to Fortín Las Chuñas is during the dry season, which runs from April to October.
This period avoids the intense heat and humidity of the summer months (December to February) and the heavier rainfall that can occur then. Cooler temperatures and less humidity make outdoor activities, particularly wildlife viewing, much more enjoyable and comfortable. You'll find the weather pleasant for exploring the region's natural beauty.
For those interested in birdwatching and wildlife photography, the shoulder months of April/May and September/October are particularly good. The milder weather means animals are more active, and the vegetation is often lusher than in the middle of the dry season, providing excellent photographic opportunities.
If you're planning a trip focused on relaxation and enjoying the natural surroundings without the crowds, visiting in the middle of the dry season, from June to August, can be ideal.