The picture below is from Radio station KQEN in Roseburg, OR. It is the official climate observing site for Roseburg. This picture is courtesy of Oregon State University Climatologist, George Taylor, whom is collaborating with me on my www.surfacestations.org project
Note that Mr. Taylor is not responsible for the thermometer placement, the National Weather Service in Medford is in charge of the observer program. and sets up the equipment. Only a couple of problems here, like the roof itself being hotter than any surrounding area on any given day, but lets just throw in a nearby rooftop air conditioning unit for good measure. A/C units exhaust quite a bit of hot air.
Here’s the temperature plot from NASA’s GISS database, which is used in global climate modeling and climate forecasting. Yes, this data is part of the USHCN “high quality” dataset used to make climate change predictions.
I’m not making this up, check it out for yourself at NASA’s GISTEMP database