Longview, Washington. Longview is a city in Cowlitz County, Washington, United States. It is the principal city of the Longview, Washington Metropolitan Statistical Area, which encompasses all of Cowlitz County. Longview's population was 36,648 at the time of the 2010 census and it is the largest city in Cowlitz County.
Average Weather in August at Grand Canyon National Park Airport Arizona, United States. At Grand Canyon National Park Airport, the month of August is characterized by gradually falling daily high temperatures, with daily highs decreasing by 4Â°F, from 83Â°F to 78Â°F over the course of the month, and rarely exceeding 89Â°F or dropping below 71Â°F.
Best Times to Visit Grand Canyon. The best times to visit the Grand Canyon are March through May and September through November when daytime temperatures begin to cool and the crowds begin to thin. If you decide to visit during the summer (the park's peak season), be prepared for hordes of tourists and very limited lodging availability.