I skipped the years 2006 - 2017 to make the change look more obvious

I recommend viewing it full screen and glancing back and forth between different years

2002 was a freak hot year

In the 2000s you see a lot of yellow and green interlaced into the summer nights, and much less dark red.
You also see much more blue in the winters

It took only 18 years to get to this point (the difference between the median years of the two data sets), and since it's always faster than expected, we probably got ~9 years for the next equivalent amount of change, and then ~4 years for the next one after that, except it's probably even faster than this so ima say 3 years till the nukes fly