You don’t even need to go into “actual data” which can be hand waved away as conspiracy by Big Whatevs. Find pictures of the past. Halloween photos, back to school pictures, stuff like that.

Thats been startling here even over 10 years. Last year I was in my shorts and a thin hoodie feeling warm. My phone popped up “memories from 10 years ago” and it was us at the same event in big coats looking cold and miserable.