Airline Carry On Baggage Restrictions I Am Traveling To A Warmer Place From A Really Cold Place In December. Will My Jacket Count As Carry Baggage?

I am traveling to a warmer place from a really cold place in december. Will my jacket count as carry baggage? - airline carry on baggage restrictions

The jacket can be (fairly thick weighing several kilograms) and I am now in a cold climate, but the place I travel a lot hotter. While the airlines are looking at my jacket as luggage and carry on the way home I had in me during the flight? Anyone with a similar situation?