Yes, the valley will be covered with snow and cold. So, unless you would like to enjoy the snow view, please come to Jiuzhaigou during other months, such as Aug to Oct.

I visited JiuZhaiGou during winter last Feb & it was fantastic. The winter view covered with all white snows & thick clouds across the skies. The river lake was very natural which u could see many different colours of the water lake. Strongly recommend to visit durign Feb if you can stand the cold winter weather abt 7-15C.

i think there're always a lot to see in jiuzhaigou. the place is real a paradise and so picturasc. actually,in different season, it is beautiful in a different way.