As well as
temp stations in northern latitudes, and picked ones near major metro areas in more southern latitudes.
Interestingly how this is a predominately unihabited area, and likely has very few
actual temp stations, nor reliable long term temp data.
As a side point, I beleive the data behind this plot does not back out the popular «heat island» effect of
the temp stations in the US being heated by civilization.
Temp Station are a rapidly growing recruitment business operating in the Midlands.