Brass Fetcher has a pretty neat slo-mo video showing the effects of extreme cold weather on a Remington R1 1911.
Using SIG 45 Auto 200-grain V-Crown hollow points and a Ransom shooting rest, the gun and ammo was chilled at extremely low temperatures for two hours before firing.
The test was conducted at -65°F (-53 C, 219 Kelvin,) which is pretty friggen cold. To put that into perspective, most home deep freezers only get down to about -15°C and the average winter temperature at the South Pole is about -49°C.
So yeah, like colder than your ex-girlfriend’s heart type cold.