botanical garden - a facility where trees and shrubs are cultivated for exhibition. arboretum. facility, installation - a building or place that provides a particular service or is used for a particular industry; the assembly plant is an enormous facility.
Keystone, CO Weather. The average temperature of Keystone is 35.80Â°F, which is much lower than the Colorado average temperature of 46.26Â°F and is much lower than the national average temperature of 54.45Â°F. Historical Weather.
7-Day Weather Forecast for Keystone. What's the weather forecast for Keystone this week? Check out the long-range weather forecast for Keystone, including temperature, predicted snowfall and wind details at the summit and base throughout the day for the next week. Tab over to overview or Hour by Hour for alternative views of the Keystone weather forecast. Summit | 11624ft. Base | 9278ft.