Planning for the weather is a good way to make your trip to Guiyang relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 71°F, while the coldest months are January and December with an average of 46°F. The rainiest months in Guiyang are June, May, April, and July, with each month seeing an average of 8 inches of rainfall.