The weather in the area is quite typical for the Midwest. The average temperature for the winter months is the mid-30s, but the summers can often be hot and humid with temperatures reaching into the 90s.
Entrance Fee - $0.00
There is no fee to tour George Rogers Clark National Historical Park. As a result of being a fee-free park, George Rogers Clark NHP no longer sells the America the Beautiful National Park passes. The nearest locations to purchase these passes are Lincoln Boyhood National Memorial, in Lincoln City, Indiana (www.nps.gov/libo), and Hoosier National Forest in Bedford, Indiana (www.fs.usda.gov/hoosier). Both are approximately 70 miles from Vincennes.
The George Rogers Clark National Historical Park Visitor Center is a great place to start your visit. The visitor center contains exhibits about the early cultures of Vincennes, George Rogers Clark's march to Vincennes, and the construction of the George Rogers Clark Memorial. It also offers a 30-minute introductory movie, "Long Knives" which shares the back story of George Rogers Clark and his military campaign. Before going to the Clark Memorial, check with the ranger at the visitor center.