Cold spots are one of the phenomenon associated with paranormal activity. I have experienced cold spots which I could track down. And others which start for no reason, which would move around at random, then dissipate. What is unknown is how and why these cold spots are formed.

To start off I will give the scientific definition of temperature. I am doing this because it is relevant to where my line of thinking is heading. Temperature is the measurement of the speed of molecules. Faster moving molecules create higher temperatures, and slower molecules create lower temperatures.

Room temperature occurs when the molecules of everything in the room reach an identical speed. The carpet, chairs, cups, tables, etc. We use room temps as our base number.

When a cold spot occurs, something is causing molecules to slow down. I am narrowing this down to just a few possible causes.

An entity actually takes a semi solid form. The molecules of this form are slower moving than the molecules of everything else in the room, thus causing a colder temperature reading in the spot where the entity is. This would also help explain how sounds are made like disembodied voices and/or footsteps. And it could explain how an entity is able to move solid objects such as keys. The physical form may just be one which the human eye can not perceive.

Entities may be entirely made of energy all the time. This energy may cause the air molecules it comes in contact with to slow down, creating the cold spot phenomenon. Intelligent entities may know this.

Entities may be able to manipulate the air near them to slow down the molecules. Possibly even manipulating the molecules themselves individually. This may explain the phenomenon recorded for TV by TAPS. There is an episode with Chris Flemming on in which an entity is asked to make the air in front of a digital thermometer probe lower in temperature. The entity caused this to happen on camera with the temp. dropping a total of 10 degrees.

These are the current ramblings in my head. I would love to hear opinions, even corrections if I have something wrong.

Fascinating Bobby! I wish we knew for sure what is happening when they try and manifest. This does make sense.

I saw the episode of TAPS as well. The fact that it seemed that the entity could intentionally control the temperature in one area of the room excited me.

I haven't had much experience with cold spots.

I stumbled across this write up which describes an experiment where increased energy output caused a measurable drop in temperature.
http://jnaudin.free.fr/html/NewMcool.htm
If this process is happening on a large scale, like a paranormal entity manifesting, then it is not really a stretch to imagine the energy being enough to drop the temperature another 8 degrees.