Other facts from our historical weather data: When is the rainy season in Muang Không? Rainy season in Muang Không occurs in the months of May, June, July, August, September and October. Does Muang Không have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Muang Không? March has an average maximum temperature of 37°C (99°F) and is the hottest month of the year. Which is the coolest month in Muang Không? The coolest month is January with an average maximum temperature of 32°C (90°F). Which is the wettest month in Muang Không? September tops the wettest month list with 346mm (13.6 in) of rainfall. Which is the driest month in Muang Không? January is the driest month with 5mm (0.2 in) of precipitation. Which is the sunniest month in Muang Không? March is the sunniest month with an average of 267 hours of sunshine. 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.