I appreciate all the replies. Hopefully, this will address some of the comments and questions regarding the original question.
My circumstances are probably unique. I am a geologist. The LCP is my town, around the shop and casual carry. When working in the field, I exchange the LCP for a revolver appropriate for the situation (including how I am feeling that day). Usually, my field carry is a S&W Model 65 .357mag w/ 3" bbl; but it could be a Ruger Single Six, Ruger Blackhawk .41mag or S&W Mod 63 .22 L.R. Again, it depends on the circumstances and my preference for the day.
Anyways, I frequently leave the LCP either in the truck or shop where - depending on the season - it can get either hell hot or damn cold.
In regards to lubricants, I have worked in Alaska when it has been so cold that we had to use finely powdered graphic because the petroleum based ones gummed or solidified. And, yes, it can get so cold that firing pins can become inoperable with convention lubricates. Graphite is messy business, but so is needing Bear Medicine and your gun is seized-up.
Also, with the polymers and alloys coming into vogue, I got to wondering about the differential coefficient of expansion/contraction between materials, e.g. with temperature changes, does the polymer contract and expand proportional to the alloy; does the 'works' get tighter or looser?
Finally, I have had the privilege of being "educated" by a long line of ol' timer's - customarily around campfire or wood stove in the company of a bottle of whisky. CO, WY, MT, ID and AK, I have been told of guns - primarily rifles - 'exploding' when fired when bitter cold. The 'conventional wisdom' is that when cartridges get really, real cold, high ignition pressures can occur. For my part, I can see potential metallurgical issues with the older guns, but the "excessive pressure when cold" ammo matter has been a reoccurring theme.
BTW, I am glad to have found this forum. There is more information available here than I ever had imagined. And, I thank you.
Geophil
P.S. Thank goodness for Spell Checker!