No. At least not if another anecdote is of any value. The Grand Rapids metro area of Michigan (February and March are quite cold, April and May starts warming) is about 2.2 million as well and there are less than 100 deaths[1]. This is despite being only about 130 miles west of Detroit where infections rage.

[1] counting Kent county and all adjacent counties.

I think so. Graphing death rate by latitude shows tropics and southern latitudes (summer during cov2 outbreak) have substantially lower death rates than up north. My best guess is sun and heat is the cause.