Best times to visit Bhutan tend to be the spring months of March, April, and May and the autumn months of September, October, and November because as these are the typical months as weather is more mild and many of the largest festivals take place during these months. In the autumn the skies are clear and blue; affording views of the high Himalayas from passes and various other vantage points. Autumn is also the time of year when the black-necked cranes migrate to central and eastern Bhutan for the winter. The skies are less clear during the spring, but the flowers are in bloom. The downside of traveling during these peak months is that there are more tourists in general, and Druk Air reservations need to be made well in advance to ensure availability. The summer months of June, July, August, and even early September are typically the monsoon months, so rain may be an issue while travelling. The winter months of December, January, and February can be cold, but the skies are clear and blue. Some treks are closed during these months due to the weather conditions. The upside of traveling during the off-peak months is that reservations are easier to secure, and there will be fewer tourists around. Bhutan is spectacular any time of the year and your trip will be a great adventure no matter when you decide to visit!