hello
Cold weather operations can be very tricky. things to consider are de-icing procedures along with a good understanding of Hold Over Times. The old saying when cold and low lookout below is true for reasons already mentioned in the thread. Adjust DA on a CAT 1 app. Also O/M altitude and sector altitudes(not FL'S). Don't forget acceleration alt. after T/O in the event of an engine failure. And all non-precision minima including circling minima. This is not only good airmanship but mandatory.