Top definition
A deceptive weather phenomenon, where indoors and behind sealed windows it feels quite warm, but outside it feels windy and quite cold.
Man1:"Why are you wearing a t-shirt? It's cold out here."

Man2:"It's window-warm, it was sweating in the car."
by chicago_citizen April 28, 2011
Get the mug
Get a window-warm mug for your brother-in-law Callisto.