From Paris, my daughter and I want to go somewhere for 3 days on the train next week. Burgges looks wonderful but only in 50's and possible rain. Any warmer suggestions?
I second Kent's comments, at this time of year, you have no guarantee of sunny weather anywhere in Europe (even the far south of Spain). So, why not just go to Brugge anyway?
Unless you want to take the TGV all the way down to Spain, you might not find much of a change in weather. Don't let it stop you though. Go where YOU want to go and just dress accordingly. I've done Bruges in March and in April and had a fantastic time on both occasions. You can always warm up in a nice cafe.