Other facts from our historical weather data: When is summer in Elko?The hottest season / summer takes place in June, July, August and September. Does Elko have a dry season? Yes, the months of February, June, July, August, September and October are very dry. Which is the warmest month in Elko? 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 Elko? The coldest month is January with an average maximum temperature of 3°C (37°F). Which is the wettest month in Elko? December tops the wettest month list with 34mm (1.3 in) of rainfall. Which is the driest month in Elko? August is the driest month with 10mm (0.4 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.