Well, the way I look at it, you have two choices:

1) Begin your trip in the colder countries (they’re going to be cold no matter what, ya know?) and finish up in southeast Europe where it will be quite warm in late May, perhaps even swimming weather. (I’ve been swimming at the Amalfi coast in late May.)

2) Begin your trip in the warmer, more southern places, then work your way north as springtime progresses.

Of course, if you already have your plane ticket, you can’t do an open jaw itinerary, you’ll have to do a loop instead.

Wintertime has its own charm; I would think that Scandinavia would be both beautiful and fun in the dead of winter.

This is exacty what I’m debating. When i first arrive in London, i will stay there for 1 week. Then fly to Morocco for 1 week. From here i am debating 2 options:

1) Fly to Istanbul and work my way up through eastern europe during the rest of January and most of February. (Istanbul-Sofia-Bucharest-Budapest-Krakow-Prague-Then begin my western europe tour in Germany during March-May).

2)Start in the western Europe in either north or south and work east towards eastern europe in late april-May.

Im thinkging of doing Istanbul and eastern europe first, but i am concerned about the lack of activity & weather in eastern europe during February.