Summers can be very warm, high 90's to 100 with the possibility of thunderstorms late afternoons. Winter temperatures can dip as low as -20 with some snow and wind. Heaviest snows can be expected in late Spring.
Admission is free. - $0.00
There is no fee for the visitor center or trails at Agate Fossil Beds National Monument.
Visitor center houses displays featuring the Miocene Era fossils found on the Agate Fossil Hills in the late 1800s. A twelve minute movie aids in the understanding of the fossils and the excavations. The James H. Cook Gallery tells the story of a unique friendship between James Cook and American Indians in the area namely Red Cloud of the Oglala Lakota. In addition, there is an interactive hiker that is useful for more information before walking the trails or during inclement weather.