Other facts from our historical weather data: Which months have the greatest rainfall in Nyingchi? Most rainfall (rainy season) is seen in May, June, July, August and September. Which is the warmest month in Nyingchi? August has an average maximum temperature of 15°C (59°F) and is the warmest month of the year. Which is the coldest month in Nyingchi? The coldest month is January with an average maximum temperature of -4°C (25°F). Which is the wettest month in Nyingchi? July tops the wettest month list with 213mm (8.4 in) of rainfall. Which is the driest month in Nyingchi? December is the driest month with 34mm (1.3 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.