Other facts from our historical weather data: When is winter in Sysslebäck? The coldest season / winter is in the following months: January, February, November and December. Which is the warmest month in Sysslebäck? July has an average maximum temperature of 21°C (70°F) and is the warmest month of the year. Which is the coldest month in Sysslebäck? The coldest month is February with an average maximum temperature of -2°C (28°F). Which is the wettest month in Sysslebäck? August tops the wettest month list with 109mm (4.3 in) of rainfall. Which is the driest month in Sysslebäck? March is the driest month with 46mm (1.8 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.