Other facts from our historical weather data: Which months have the greatest rainfall in Colbost? Most rainfall (rainy season) is seen in January, October, November and December. Which is the warmest month in Colbost? August has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Colbost? The coldest month is February with an average maximum temperature of 9°C (48°F). Which is the wettest month in Colbost? January tops the wettest month list with 175mm (6.9 in) of rainfall. Which is the driest month in Colbost? May is the driest month with 87mm (3.4 in) of precipitation. Which is the sunniest month in Colbost? May is the sunniest month with an average of 197 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.