The best time to visit Cougar, Washington, is generally during the late spring to early autumn months, from May to October.During these months, the weather is typically mild and pleasant, making it ideal for outdoor activities. You'll find less rain and warmer temperatures, which is superb for exploring the surrounding Gifford Pinchot National Forest, hiking the trails around Mount St. Helens, or enjoying the waters of Yale Lake. Most local businesses and attractions are fully operational during this peak season.For those keen on hiking and experiencing the full beauty of the volcanic landscape, July and August offer the warmest and driest conditions. This is when the snow has usually melted from higher elevations, opening up more challenging trails and providing clearer views of Mount St. Helens.If you prefer a quieter trip with fewer crowds and don't mind slightly cooler temperatures, late May to early June or late September to October can be excellent.