Other facts from our historical weather data: Which is the warmest month in Cerrig-y-Druidion? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Cerrig-y-Druidion? The coldest month is February with an average maximum temperature of 7°C (45°F). Which is the wettest month in Cerrig-y-Druidion? December tops the wettest month list with 116mm (4.6 in) of rainfall. Which is the driest month in Cerrig-y-Druidion? April is the driest month with 87mm (3.4 in) of precipitation. Which is the sunniest month in Cerrig-y-Druidion? May is the sunniest month with an average of 169 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.