dartman, well from my experience flying in the northern part USA and couple of times in Canada we haven't done it, the items listed in the previous post are from airbus recommendation. However after more carefully studying the matter that's what I have found out from PAN OPS:
4.3.1 Requirement for temperature correction
The calculated minimum safe altitudes/heights must be adjusted when the ambient temperature on the surface is much lower than that predicted by the standard atmosphere. In such conditions, an approximate correction is 4 per cent height increase for every 10°C below standard temperature as measured at the altimeter setting source. This is safe for all altimeter setting source altitudes for temperatures above -15°C.
4.3.6 Small corrections
For practical operational use, it is appropriate to apply a temperature correction when the value of the correction exceeds 20 per cent of the associated minimum obstacle clearance (MOC).
Well, my understanding of this subject would be as follow: You need to apply the corrections on all the other ALT (by the way the PAN OPS speaks about altitudes and heights) to ensure the obstacle clearance as you solely rely on the altimeter as primary guidance source, whereas on ILS your primary source is ILS ground facility, which isn't necessarily affected by cold/hot weather. However, altimeter cross checks (OM or relevant DME reading) are supposed to confirm the correct position on the glide (mainly protection against capturing false GS beam). I think you would agree, that your true height on the glide path, during correct GS following remains the same, regardless of the OAT. What does change is the indicated ALT, which varies with the OAT. Consequently at DA you will be either at lower or higher true ALT (corresponding to the Indicated ALT), again dependable on OAT. However the deviations are negligible (we are talking about 20 ft for DA of 200 ft CATI at sea level assuming off standard temperature lapse rate. At higher elevations, you are good anyway)and would consequently take influence on the required VIS/RVR. How much do you need to increase the VIS/RVR for 20 ft? That's why I think the correction to the DA can be disregarded. With the OAT lower than -15C, i am not really sure.
Arctaurus, don't forget its a off standard temperature lapse rate, which has been calculated as linear change, which isn't always necessarily the case.
I would be interested in other opinions and if anybody has got the experience how to apply the corrections, welcome to share.
Cheers.
