The best time to visit San José De Isnos is during the dry season, which runs from December to March.
During these months, you'll experience pleasant weather with less rainfall, making it ideal for exploring the region's outdoor attractions. This period is particularly good for solo travelers and couples interested in hiking and visiting archaeological sites like the San Agustín Archaeological Park, as the trails and sites are more accessible and enjoyable.
The shoulder seasons, April to June and September to November, can also be good, offering fewer crowds and still relatively good weather. However, you should be prepared for occasional rain showers during these times.