If the window is cooler/colder than the inside temperature then condensation will form on the windows. Shops have major condensation problems and they have to fix a blower system to dry the moisture on the windows to enable people to see their stock.
This problem is not to be confused with double glazed systems that have "Blown" where the seal in the unit is leaking , and moisture forms between the two panels which form the double glazed unit.
Secondary double glazing is the best for reducing the problem, but many dislike it for aesthetic reasons.
Al