Lhasa has the coldest January tempreture. I'm sure.
I think Lhasa has the highest altitude so it is colder.
about 5-9 degrees C in the day and about 2-3 degrees C at night
The average temperatures are: Celsius: High- 30 Low- 20 Fahrenheit: High- 86 Low- 67
about 5c or so
21 degrees
I don't know for sure, but I live in Wisconsin so I'm guessing it's about 15 degrees.