What would be the real-life equivalent for climate patterns for the Wildemount region?

what would be the real-life equivalent for climate patterns for the Wildemount region? Central Europe, or someplace bit warmer? Central Europe/Western Russia is the intended print

— Matthew Mercer (@matthewmercer) January 27, 2018

For the heart of the Dwendalian Empire, anyway. It ranges southward to grow warmer.

— Matthew Mercer (@matthewmercer) January 27, 2018