How warm was it back then? Did they need global warming?
If this was at the end of the last ice age then yes.
I was lucky enough to have visited Scotland in May of 2006. It was the middle of May, and it was snowing in the highlands. A couple on the bus tour from northern Australia had never seen snow, and asked the tour guide if we could stop so they could take pictures. They said their friends back home wouldn’t believe them unless they had photos of it.