The best times to visit the Grand Canyon is during the spring or the fall, including the months of March through May and September through November. During these months the temperatures are moderate and the park is less crowded than during the summer.
The vertical aspect of the canyon means that many different climate zones are experienced during a given season. The South Rim averages 1,000 feet lower in elevation than the North Rim and is correspondingly warmer. The bottom of the canyon averages 5,000 feet lower in elevation than the South Rim and is where the hottest temperatures occur. The South Rim is the most popular and is open year-round, while the North Rim sees only 10 percent of the number of visitors of the South Rim, and its facilities are open May 15 through October 15.