How about if you include a taiga/ steppe/ tundra zone between arctic and temperate, and a savannah area of some sort between arid and any of the wet zones?

I guess you're figuring on a Gulf Stream type current unnaturally warming the NE continent? I'll buy that getting it somewhat warmer than 'normal' for its latitude, but like Master Rahl372 said, not all the way to being tropical.

Your land shapes will be more plausible if the n and s edges as depicted are not quite 90 degrees n or s. Csn we guess that what you show only goes to 80 or 85 degrees n & s?

What combination of prevailing wind and ocean currents are going to get you those two arid islands just offshore of a wetter temperate zone? Or for that matter the big entirely arid island to the equatorial east?