I live in North Texas. We see lows in the low 30s seasonally this time of year, but the average highs are in the mid-50s. Why in the world would I feel the need to slap winter tires on my car?
The OP lives outside of Charlotte, N.C., which gets 2 inches of snow a year. Two. The average low temp in January is 31. (In Dallas, it's 30.) The average high is 51. (In Dallas, it's 56). The climate is very similar. As long as the OP doesn't drive west into the mountains and dosn't drive the car consistently when temps are below freezing, he's fine.