So, is it cold?
When the wind chill is the same degree in Celsius and Fahrenheit, it's cold.
When I stop riding my bike, it's cold.
When the car makes weird cold-weather noises, it's cold.
When I start fantasizing about warm-weather islands like Hawaii, Jamaica and Iceland, it's cold.
When I give up writing regular posts and write about the weather, it's cold.
It's cold enough.