In my inland US east coast hometown there’s been a big shift in winters. It used to be that it consistently got quite cold after late September to mid October, winters consistently came with several feet of snow, and spring hadn’t fully arrived until well into April. For the past several years winter has almost disappeared — many years there’s almost no snow and it sometimes doesn’t even get that cold. It’s kind of an indistinct smudge in between fall and spring.
Things have changed where I live now on the northern half of the west coast too, though I wasn’t here to witness the change. Most houses weren’t equipped with AC when they were built because it was rarely needed. Now it’s a must for between good third and half of the summer depending on exactly where you’re at.
Serious change is afoot, that much is undeniable.