Sunset out here near Chicago is about 4:30pm, it's usually dark about 30-40 minutes later.
http://www.timeanddate.com/worldclock/astronomy.html?n=64
http://www.timeanddate.com/worldclock/astronomy.html?n=64
5:12 tonight, according to the interwebs.
It will be 5:13 for me, as I'm a few kilometers west of you.
Why is it VC has longer sun despite being more north than New England? (4:30 here).