Though weather is just one factor, it can really affect your travel plans, especially when you’re planning an extended stay in Wuwei County. The hottest months are usually July and August with an average temp of 79°F, while the coldest months are January and December with an average of 45°F. The rainiest months in Wuwei County are July, June, August, and May, with each month seeing an average of 9 inches of rainfall.