Vinyl is a practical choice for floors above or below grade in any type of climate.
Flooring for cold floors.
Glue carpeting to your subfloor material to minimize moisture penetration.
Floors of ceramic stone or concrete are the worst culprits with hardwood a runner up.
A cold floor is also an indication of a drafty uncomfortable house which makes your home a less desirable place to live.
Some issues are structural and logical.
Insulating the floors rim joists and headers can be an effective way to warm these floors.
To prevent cold floors in this situation you can add insulation between the ceiling of the room below and the floor of the room above or you can use carpeting in the room above to help insulate.
Start with the simplest solution which will help provide a comfortable temperature for the whole house not just the floor.
Luckily there are ways to combat this chilly predicament.
Keep cold air out warm air in.
As an added negative impact of cold floors the cold conditions in your home will cause your heating system to work extra hard to combat it leading to an increase on your utility bills.
You can expect the stone floor of your screen porch or the basement linoleum laid on cement to be cold and carpet is the logical warmer.
Radiant below surface heating is the most expensive option but also the most effective.