Other facts from our historical weather data: Which is the warmest month in Yanbu? August has an average maximum temperature of 37°C (99°F) and is the warmest month of the year. Which is the coldest month in Yanbu? The coldest month is January with an average maximum temperature of 26°C (79°F). Which is the wettest month in Yanbu? November tops the wettest month list with 17mm (0.7 in) of rainfall. Which is the driest month in Yanbu? September is the driest month with 0mm (0 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.