You’re not the first to ask! I should do a post on Vald weather. I actually tied the Vald calendar somewhat to the Hebrew calendar.
The actual weather isn’t an analog to the real world; Vald is considerably wet and humid for half the year, then dry and lifeless the other half. Dead is definitely closer to Winter, but not as cold. Dry is like Fall before it snows, but not as cold. Wet is Spring but much, much wetter. And Harvest is like late Summer.