No. It's just water condensing and freezing on glass. It does indicate the need for better insulation, storm windows, etc.
Lower the humidity
Could be heater core is starting to leak
Frost is related to condensation, so for the most part I will be reffering to condensation. But condensation forms on the outside of a cold object when the air around it is relatively humid. When air gets colder it cannot hold as much water vapor in it, so the air which is cold from the cold object has excess water in it that it needs to get rid of, depositing it somewhere, most likely the cold object. Frost is formed when the condensation freezes.
Frost forms on car windows when the temperature drops below freezing and moisture in the air condenses and freezes on the cold surface of the glass.
You might be looking for "frost".
frost
frost
When the temperature of the glass surface is below the dew point temperature of the air inside the room, moisture from the air condenses on the glass surface. If it's below freezing, this condensed moisture turns into frost. This happens because the cold glass surface causes the warm air inside to lose its heat, leading to condensation and subsequent freezing.
The danger normally is when cars can crash as it can be slippy also its very dangerous as it can give you frost bite depending on how cold
Frost forms on the inside of a windshield when warm, moist air inside the car comes into contact with the cold surface of the glass, causing the moisture in the air to condense and freeze.
Frost forms on the inside of a window when there is a significant temperature difference between the inside and outside of a room, causing moisture in the air to condense and freeze on the colder surface of the glass. This can happen when the inside of a room is warm and humid while the outside is cold.
Frost forms in the freezer when warm, moist air enters the cold environment and condenses on the surfaces inside. This moisture then freezes, creating frost.