I did the same with my old bfg sport comp 2s and I was pretty surprised how well they did in 0C with in wet(they are a -7C cracking tire). I'd guess they still had better braking than most snow tires I've run in the 2000's who didn't do well in wet grip. The engineering explained guy also did some cold weather tests on clean dry pavement of summer performance tires and still found the large tread block won out over the squirm and air gaps of winter tires by quite a big margin.
My sisters ex-boyfriend did get his Viper home somehow in an inch of snow with pilot super sports but I doubt he's ever tried that again!
Now for sure I'd always recommend a good winter or all season tire for dealing with all fall conditions though. But if you are caught with summers with just near freezing temps and a bit of moisture, for 2 lane roads anyways, I'd just tip toe it home, and swap to winters that night.