Other facts from our historical weather data: Which months have the greatest rainfall in Qilian? Most rainfall (rainy season) is seen in July and August. Does Qilian have a dry season? Yes, the months of January, February, November and December are very dry. Which is the warmest month in Qilian? July has an average maximum temperature of 15°C (59°F) and is the warmest month of the year. Which is the coldest month in Qilian? The coldest month is January with an average maximum temperature of -8°C (18°F). Which is the wettest month in Qilian? July tops the wettest month list with 161mm (6.3 in) of rainfall. Which is the driest month in Qilian? December is the driest month with 5mm (0.2 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.