Planning for the weather is an important factor for making your trip to Ngawa Autonomous Prefecture a success, especially when you're splurging. The hottest months are usually July and August with an average temp of 50°F, while the coldest months are January and December with an average of 20°F. The rainiest months in Ngawa Autonomous Prefecture are June, May, July, and September, with each month seeing an average of 7 inches of rainfall.