Germany is a little larger than Missouri and Arkansas combined, and has a fairly coherent long term temperature record at 13 stations.
There has been a warming trend in Germany since 1980.
This can’t be explained by UHI, HOHENPEISSENBERG is a rural station at 3,100 feet elevation, and MUENCHEN is an urban station at 1,700 feet elevation.
Munich is warmer, but the two stations track each other very closely.
A typical July afternoon in overheated southern Germany is 71 degrees.
These two stations have warmed considerably since 1980, and I don’t see any reason to think the trend isn’t real.
