Other facts from our historical weather data: When is summer in Winnemucca?The hottest season / summer takes place in June, July, August and September. Which is the warmest month in Winnemucca? July has an average maximum temperature of 34°C (93°F) and is the warmest month of the year. Which is the coldest month in Winnemucca? The coldest month is December with an average maximum temperature of 5°C (41°F). Which is the wettest month in Winnemucca? April tops the wettest month list with 31mm (1.2 in) of rainfall. Which is the driest month in Winnemucca? August is the driest month with 4mm (0.2 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.