The stations on the map are uniformely distributed, and the temperature trend is a clear representation of the climate status of the region.
South Dakota has warmed by +0.644º F (+0.342º C) in 100 years, or 0.06º F (0,03º C) per decade. As Oregon, it is not much, especially if we correct many stations for their "urban heat island effect", that may be as high as 2º C to 4º C. According to the IPCC, they have corrected for this effect, but it is not clear when, where and by how much they have corrected - if they did it at all.
Once more, correcting the data for this effect would indicate that cities that have indeed cooled, have really cooled more than shown in the uncorrected records.
Global warming means there is an overall warming everywhere in the world, but there must be a reason for the cooling in some regions - reason that has not been explained by any climate model. As CO2 is blamed for the temperature increase and, as CO2 has increased steadily, there shouldn't be any cooling anywhere. As we see cooling in many places around the world, the relation between CO2 and temperature increase is a false one.
Furthermore, as the relation between CO2 and temperature is derived from computer models, these climatic models are not an accurate image of the climatic system, and they cannot give an accurate prediction of the future climate.