I think we need naisme to chime in on this thread. He has been doing year round commutes in the Twin Cities over 20 miles since have been a member of this board. (often on a fixie!)
My commute is 6.5 miles to work and around 20 miles home when I take the scenic route. I commute 5 days a week.
IMHO, your commute is do-able. It will require you to make the commitment to doing it. As others have said, start slow and work your way up to daily commuting. As turtlendog said, "time spent on your bike will pay dividends elsewhere." So true, so true.
Good luck!
Bob