Other facts from our historical weather data: When is summer in Evansville?The hottest season / summer takes place in June, July, August and September. Does Evansville have a dry season? Yes, the months of January, February and November are very dry. Which is the warmest month in Evansville? July has an average maximum temperature of 31°C (88°F) and is the warmest month of the year. Which is the coldest month in Evansville? The coldest month is December with an average maximum temperature of 2°C (36°F). Which is the wettest month in Evansville? May tops the wettest month list with 73mm (2.9 in) of rainfall. Which is the driest month in Evansville? November 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.