Can chocolate withstand a car/train trip to Helsinki?

Trains are often well air conditioned, and so are most cars today. In this case, it is enough to keep the chocolate out of direct sunlight, then even a long trip will not be a problem. In a not air-conditioned car (or if the air conditioning is not efficient enough), chocolate can easily go bad. Even if the outside temperature is “only” 24 degrees, the sun shining through the windscreen on the highway five does heat the passenger compartment efficiently, so air conditioning is necessary even then to keep the chocolate in shape.