NFL Network is in the process of their unveiling of the 2013 schedule.  Via Access Vikings, the Minnesota Vikings 2013 schedule is as follows:

Week Day Date Opponent Time (CT) TV & Radio
1 Sunday Sept. 8 at Detroit Noon FOX | KFAN
2 Sunday Sept. 15 at Chicago Noon FOX | KFAN
3 Sunday Sept. 22 vs. Cleveland Noon CBS | KFAN
4 Sunday Sept. 29 vs. Pittsburgh* Noon CBS | KFAN
5 BYE
6 Sunday Oct. 13 vs. Carolina Noon FOX | KFAN
7 Monday Oct. 21 at New York Giants 7:40 PM ESPN | KFAN
8 Sunday Oct. 27 vs. Green Bay 7:30 PM NBC | KFAN
9 Sunday Nov. 3 at Dallas Noon FOX | KFAN
10 Thursday Nov. 7 vs. Washington 7:25 PM NFLN | KFAN
11 Sunday Nov. 17 at Seattle 3:25 PM FOX | KFAN
12 Sunday Nov. 24 at Green Bay Noon FOX | KFAN
13 Sunday Dec. 1 vs. Chicago Noon FOX | KFAN
14 Sunday Dec. 8 at Baltimore Noon FOX | KFAN
15 Sunday Dec. 15 vs. Philadelphia Noon FOX | KFAN
16 Sunday Dec. 22 at Cincinnati Noon FOX | KFAN
17 Sunday Dec. 29 vs. Detroit Noon FOX | KFAN