Other facts from our historical weather data: Which is the warmest month in Saint Cyrus? 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 Saint Cyrus? The coldest month is February with an average maximum temperature of 8°C (46°F). Which is the wettest month in Saint Cyrus? October tops the wettest month list with 108mm (4.3 in) of rainfall. Which is the driest month in Saint Cyrus? May is the driest month with 62mm (2.4 in) of precipitation. Which is the sunniest month in Saint Cyrus? May is the sunniest month with an average of 193 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.