Other facts from our historical weather data: Which is the warmest month in Chelmorton? July has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in Chelmorton? The coldest month is February with an average maximum temperature of 7°C (45°F). Which is the wettest month in Chelmorton? June tops the wettest month list with 99mm (3.9 in) of rainfall. Which is the driest month in Chelmorton? March is the driest month with 76mm (3 in) of precipitation. Which is the sunniest month in Chelmorton? May is the sunniest month with an average of 199 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.