Here's a site that shows you what stations might be picked up in your area. You can use the 'change address' link to insert your specific address.
For us in Wolfeboro it indicates our best bets would be ION in Concord, PBS in Biddeford, and Telemundo in Merrimack. We had a digital antenna from our last move, tried it, and the three occasional pictures we got for those channels basically confirms the site's accuracy.
In short, it doesn't look hopeful for over the air reception.