[xX2DXx]

I need help, I haven't traveled anywhere out of the U.S. and I'm leaving on a trip to Europe.
France,Rome,London and I want to know how there climate is and what type of clothing should I bring with me?.
I'm going to be walking everywhere and I'm not sure what I should bring with me, so can I have some advice from someone who has traveled there or is living there now.