Other facts from our historical weather data: When is summer in Ely?The hottest season / summer takes place in June, July, August and September. Does Ely have a dry season? Yes, the months of June, August and November are very dry. Which is the warmest month in Ely? July has an average maximum temperature of 30°C (86°F) and is the warmest month of the year. Which is the coldest month in Ely? The coldest month is January with an average maximum temperature of 3°C (37°F). Which is the wettest month in Ely? April tops the wettest month list with 30mm (1.2 in) of rainfall. Which is the driest month in Ely? June is the driest month with 12mm (0.5 in) of precipitation. 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.