Last year was the first time we took trains to travel in Europe.. In July we took trains in Paris ( to visit Castle Fountainbleau on the outskirts of Paris) and in Amsterdam. They were very hot. There was no air conditioning and there were windows that you could only open about 2 inches from the top in some of the train cars.Some train cars had windows which could not be opened. The heat was unbearable. Is it the same on the trains to and from Milan? If there is no air conditioning, are there windows that you can open more than an inch or 2 from the top? The train rides we took were at least an hour and it was stifling hot on those trains.