Other facts from our historical weather data: When is summer in Canyonlands National Park?The hottest season / summer takes place in June, July, August and September. Does Canyonlands National Park have a dry season? Yes, the months of January, February, March, April, June and November are very dry. Which is the warmest month in Canyonlands National Park? 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 Canyonlands National Park? The coldest month is January with an average maximum temperature of 3°C (37°F). Which is the wettest month in Canyonlands National Park? October tops the wettest month list with 32mm (1.3 in) of rainfall. Which is the driest month in Canyonlands National Park? June is the driest month with 9mm (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.