Other facts from our historical weather data: Which months have the greatest rainfall in Glacis? Most rainfall (rainy season) is seen in January, May, November and December. Which is the hottest month in Glacis? April has an average maximum temperature of 30°C (86°F) and is the hottest month of the year. Which is the coolest month in Glacis? The coolest month is July with an average maximum temperature of 27°C (81°F). Which is the wettest month in Glacis? January tops the wettest month list with 238mm (9.4 in) of rainfall. Which is the driest month in Glacis? July is the driest month with 69mm (2.7 in) of precipitation. Which is the sunniest month in Glacis? May is the sunniest month with an average of 254 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.