Other facts from our historical weather data: When is winter in Lomonosov? The coldest season / winter is in the following months: January, February, March and December. Which is the warmest month in Lomonosov? 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 Lomonosov? The coldest month is February with an average maximum temperature of -2°C (28°F). Which is the wettest month in Lomonosov? August tops the wettest month list with 87mm (3.4 in) of rainfall. Which is the driest month in Lomonosov? March is the driest month with 44mm (1.7 in) of precipitation. Which is the sunniest month in Lomonosov? June is the sunniest month with an average of 276 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.