Other facts from our historical weather data: When is summer in Rossiyskiy?The hottest season / summer takes place in June, July, August and September. Which is the warmest month in Rossiyskiy? August has an average maximum temperature of 32°C (90°F) and is the warmest month of the year. Which is the coldest month in Rossiyskiy? The coldest month is January with an average maximum temperature of 5°C (41°F). Which is the wettest month in Rossiyskiy? June tops the wettest month list with 72mm (2.8 in) of rainfall. Which is the driest month in Rossiyskiy? August is the driest month with 41mm (1.6 in) of precipitation. Which is the sunniest month in Rossiyskiy? July is the sunniest month with an average of 303 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.