Harsil is at an altitude of 2620 mts/8595 ft above sea level so you can expect cool climate throughout the year. Harsil-Dharali-Gangotri belt is fairly untouched and peaceful place compared to the usually crowded popular hill stations which makes it an ideal offbeat holiday destination for travelers, both from within India and outside. Weather in Uttarkashi town can vary from that at Harsil due to difference in altitude. Harsil overall has a cool temperature all through, which makes it a perfect getaway to escape the summer heat of the plains.
Summer: April to June is one of the best times to visit Uttarkashi. These months witness maximum tourist traffic to the region. The temperatures are fairly pleasant ranging from 15°C to 25°C making it ideal for a great holiday experience. Do not forget to carry light woolens to enjoy the chilly evenings.
Rain: July-August is the time for monsoons that bring the temperatures further down between 10°C to 20°C. There aren’t as many visitors to the region during the rains, therefore it can be a good time to visit when you want to experience complete peace and quiet. However, it is always good to check weather forecast and condition of the roads before you plan to take a trip. Don’t forget to carry your rain gear and woolens.
Autumn: Post the rains, September and October is also a popular time to visit when the winter is about to set in. The Gangotri temple is closed starting from October end until April of next year therefore many people visit the temple during this time to pay their respects before the closing. The tourist inflow compared to the summers is lesser and therefore there is less traffic on the roads. Weather is fairly cold at 5°C to 12°C so make sure to pack your warm clothes.
Winter: The months from November to February/ early March can be pretty harsh with freezing day and night temperatures ranging from 5°C to below 0°C. Accessing the area during this period can be pretty difficult because of heavy snowfall and road blockages. Several villages are also closed during winters as villagers migrate to more habitable Uttarkashi town for these months. However, for adventure seekers, there could not have been a better time to visit Harsil. Seasoned hikers often visit Gaumukh, Tapovan and Dayara Bugyal in the snow for adventure treks and skiing opportunities that very few other places in India can offer.