I use to live in NW Ohio, now I live in New Hampshire. I can say get outside and ride. I'm riding 7 days a week, outdoor here in New Hampshire. Our weather is worse than yours, both cold and snowy and I still get out daily on the bike anywhere from 10-100+ miles. I just rode 134 miles on Thursday with temps starting out around 30 and the high reached around 41. Today it was windy, sunny and 30 for a high and by the time I get home I'll have in around 50 miles today. I'm planning for 100+ tomorrow. It's not to cold to ride outdoors right now. You just have to rethink and relearn how to handle the cold conditions and then you won't notice them anymore and you'll be able to ride all day long all winter long and it won't effect you any at all. I'm typically riding in cycling shorts and nylon wind pants, even down to 20 degrees F. You don't need much to keep you warm, you just need to ride to stay warm.
Get outdoors and enjoy winter, don't sit inside and complain about it. The only reason for seasonal effective disorder is people are too afraid to go outside and have fun this time of the year. Don't be a chicken...just get out there.