Other facts from our historical weather data: Which is the warmest month in Osh? July has an average maximum temperature of 32°C (90°F) and is the warmest month of the year. Which is the coldest month in Osh? The coldest month is January with an average maximum temperature of 3°C (37°F). Which is the wettest month in Osh? April tops the wettest month list with 115mm (4.5 in) of rainfall. Which is the driest month in Osh? August is the driest month with 22mm (0.9 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.