You won't need dedicated winter tires, imho. I'd tough it out with summer tires where you live. And on the really cold snap days (rare beasts that they are) just drive your other vehicle with A/S tires.
I've driven on the Michelin summer tires in freezing conditions (outside showed exactly 32F on a few occasions). The road surface was far above freezing, so the beginning air temperature (which would be the tire temperature) rapidly was made warmer by riding over the road. Days of mild temperatures, followed by a day or two (or even a few) of freezing nights, do not freeze the road unless you have many days in a row of days and nights that don't get above freezing. Don't go by the air temperature expecting your tires to be that cold while running on them. The surface temperature is where the tire starts, after just a very few miles, then warms up two to four degrees above that. That's why I never slid or felt squirrely on my summers even when the air turned cold.