Time to take snow tires off?

Marker is consistent weather above 10 degrees. I'm waiting about two weeks myself.
 
When the average LOW temp is a few degrees above zero
I'd say mid April at the earliest
 
Plan on doing the swap on Good Friday for the one with all seasons. The other one with summer high performance tires, probably end of April.
 
I take off the winter tires the end of April and change back the end of October. It's working for me.
 
Snow tires? Gee I forgot there were such things (in Phoenix) Oh yes when I lived in Minneapolis and the remote heaters turned on to warm up car when -30F.