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.
The only trick to our autumn wonderland is going at the perfect time of the season, so check back soon for our Fall Foliage Reports, starting weekly at the end of September. It's also the harvest season in Keystone Country when PA produce is ripe for the pickin'.