The center was injured on an open-ice hit by Chicago Blackhawks forward Drake Caggiula with 21 seconds left in the first period of a 5-2 loss Sunday. Caggiula received a minor penalty for interference at 16 seconds.
"It will be a month at least until we're talking about his re-entry," coach Paul Maurice said Monday.
Lowry has 10 points (four goals, six assists) and is minus-3 in 47 games this season.
The Jets play at the Carolina Hurricanes on Tuesday (7 p.m. ET; FS-CR, TSN3, NHL.TV) before the All-Star break. They recalled forward Kristian Vesalainen from Manitoba of the American Hockey League on Monday.
