Other facts from our historical weather data: When is summer in Salt Lake City?The hottest season / summer takes place in June, July, August and September. Does Salt Lake City have a dry season? Yes, the months of July and August are very dry. Which is the warmest month in Salt Lake City? July has an average maximum temperature of 33°C (91°F) and is the warmest month of the year. Which is the coldest month in Salt Lake City? The coldest month is January with an average maximum temperature of 3°C (37°F). Which is the wettest month in Salt Lake City? April tops the wettest month list with 70mm (2.8 in) of rainfall. Which is the driest month in Salt Lake City? July is the driest month with 16mm (0.6 in) of precipitation. Which is the sunniest month in Salt Lake City? July is the sunniest month with an average of 381 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.