The Chadar trek takes place in the coldest time of winter so that the Zanskar is completely frozen and you can trek on it. You can expect days to be anywhere between -5 and -10 degrees Celsius. However, at night it can drop drastically, going to -15 to -20 degrees Celsius. During the day, it’s not difficult to stay warm while you’re walking, but once you arrive at camp, you’ll start to feel the cold. Make sure you have the right thermals, fleeces, jackets, and hats, socks, gloves, etc.