Today's temperatures where I live will range from 15-30 degrees F.  Cause for concern?

Flight wise, not really much concern. Hover for a bit before you go zipping off. I and others have had cold weather issues with the camera gimbal going limp and becoming non-responsive until it warms up again.

Oops, I hit Enter... Anyway, I think the manual or specs mention the flight temperatures between 1 and 40 degrees C, so fly at your own risk, but many of us have flown in colder weather. Some advise to keep your batteries warm before you fly.