Full disclosure: I had no idea what to bring on this Mongolia trip. We had only 11 days, plus two days of transit time and two days in Hong Kong on a layover. I had heard that Central Mongolia (where we had to stick to because of time constraints) was cold at night, but we were also planning to go to the hot Gobi Desert and camp in Gorhi-Terelj National Park.
As far as I could see, I needed to pack light but also bring hot weather gear, cold weather gear, clothes for roughing it in the Gobi Desert but also walking around cosmopolitan yet humid Hong Kong, camping gear, etc etc etc.
I made some mistakes, but this list is the mistake-free, comprehensive, ultimate, full list of what to pack for two weeks in Mongolia. The list of extra stuff I brought for Hong Kong is at the bottom, in case you are also doing a city stopover. Ulaanbaatar is home to one of the most stylish populations I’ve seen in any city, though, so you might want to skip the travel fashion and bring some regular fashion if you want to fit in with the locals there.
Everything you need to spend (at least) two weeks in Mongolia and still pack light: