I mean the relatively speaking, summer warmer than winter, winter warmer than summer. We don’t know the prevailing temps at high latitudes at that time, but, the article spoke of dinosaurs acclimated to freezing temperatures and we know they lived at very high latitudes. Since lower latitudes were very warm and lush, I’m thinking that near the poles it could have had freezing during winter and warmer growing season in the summer. Kinda like the Tundra or a bit warmer like upper temperate.