The park lies in a humid continental zone with a generally temperate climate. Winters are mildly cold with average temperatures around 30 degrees (F). Summers are hot and humid with an average temperature around 75 degrees (F). Average annual total rainfall is just under 38". Snowfall in the winter is generally light with an average total snowfall of less than 24".
No Entrance Fees - $0.00
There are no entrance fees to any of the park's open sites.
The only visitor center among all open sites of Hopewell Culture National Historical Park is at Mound City Group. Except for Thanksgiving Day, December 25th and New Year's Day, the visitor center maintains regular Hours of Operation on a daily basis. Mound City Group visitor center is located on the north side of Chillicothe, near two State of Ohio correctional facilities and Unioto Schools.