As far as I know, no Weber grill comes with a cover.
Unless Weber has changed something, my 320 did NOT come with a cover, had to buy it separately.
GREAT grill by the way. The warming rack is kind of useless I find but other than that, it's awesome.
Has the snow melted out there on "the rock" yet? We had a bad winter here in Ontario but I know my fellow canucks had it worse out east.
The warming rack is good for toasting buns/rolls. Doesn't hold many though.