The best time to go to El Charco, Nariño, Colombia, is during the drier months, typically from June to August and again from December to February.
These periods generally offer more sunshine and less rainfall, making it easier to enjoy outdoor activities and travel around the region. The weather is usually warm and pleasant, ideal for exploring the natural beauty of the area.
For those interested in local festivities, visiting in August might coincide with cultural events, offering a richer experience of the local traditions. However, it's always a good idea to check specific event calendars closer to your travel dates.
While the "shoulder seasons" just outside these drier windows (e.g., March-May or September-November) can also be pleasant, there's a higher chance of encountering rain.