From Airbus “ Gettin grip with cold weather ops “ :
“ On approach, at least the following published altitudes must be increased in low OAT conditions:
• MSA,
• FAF altitude,
• Step-down altitude(s) and MDA(H) during a non-precision approach,
• OM altitude during an ILS approach,
• Waypoint crossing altitudes during a GPS approach flown with vertical navigation.
As it is not allowed to modify the altitude constraints of a non-precision approach, a minimum OAT to fly the approach with the «FINAL APPR» FMGC mode must be established.
For OAT lower than this minimum, selected vertical navigation must be used.”