it is definitely cooling

look at solar activity if you want a true indicator of climate shift. It's been proven out for over a century.

We've been in a solar minimum for a number of years now. We will continue to see cooling for decades to come.

That tells us that high temperatures are decreasing. Now what about low temperatures?

The temperature records are all manner of fucked up. Adjustments and "homogenisation" all over the place. Much of the "waning" is from higher overnight low temps. This is mainly due to urban heat Island effects, which get "homogenised" out into the surrounding areas.