Temperature in summer aboard Eurostar and other trains throughout Europe

You will never find airconditioning in France that is too cold. At most they will need lightweight long sleeves on the train.

I will say the same for Italy. The Italians NEVER air-condition anything at all to the frigid levels of the U.S. Being too warm in your hotel rooms would more likely be your concern, and some regional commuter trains can be an issue there as well, although it doesn't look like you're taking any of those.

Some museums, such as the Vatican's in Rome, can be downright sweaty. You definitely do not need long pants and sweaters in July to stay warm. You do need a reasonable amount of modest cover-up (knees and shoulders) for many of the churches.

Being too cold is the last thing I would worry about. Maybe long pants just to look nice but no sweaters. Check this off you list and move to the next item.

No in Europe they don't overdo the a.c. to a degree like you notice in some places in the USA in summer.

Thank you for all this info.

If you're looking for meat-locker AC on trains in Europe or the EuroStar, you'll be disappointed. Now, the fast trains ICE , TGV etc have AC, in past decades, 1970s and 1980s, etc no such thing in Germany. I don't think the regional trains in France have AC.

Having AC is one thing on the train, having it work when you're on it is another story.

There is air conditioning, barely. You will still be toasty warm on trains and most other places even if they state they have A/C. It’s the European way. Happy travels

I would say at least twice, if I can remember correctly, on recent trips I was on the ICE train with the AC not functioning. In 2017 going back to Berlin from Hamburg in June, the AC was out of order. A DB staff guy announced the explanation only in German and said bottled water would be passed out...free, obviously.