We're planning a visit to Jiuzhaigou mid March. What would the weather be like?

Hi, during that time, the average temperature will be 3-5C. And there is big temperature difference at the daytime and at night. So you need take along sweater and overcoat.
I am not sure about the exact water level, but you can still enjoy very nice scenery at that time. Among all the lakes, Panda Lake could be the must-see one then.