In the figure below, I’ve calculated the average unadjusted temperature for actual cities,
First question that pops into my head reading this is: is there a reason that the "unadjusted" temperatures are preferable to the "adjusted" temperatures? Reading the article, my first impression is that the unadjusted temperatures are preferable to McIntyre because he can find trends in them and then cast aspersions on the adjustments because they remove the trends -- when maybe the reason for the adjustments (left unstated) is to remove spurious trends.
You can try all you want, but nature and the data indicate that it warmed up in the 20th century and its warming up faster now -- globally. You can't "adjust" when a lake thaws in the spring.
