If the instruments were properly sited and the data collected and interpreted honestly, he might have a point. However, given their (warming weenies) propensity to count temperature measurements taken in ludicrously inaccurate ways, the atmospheric ones are probably more trustworthy. There's no one there to put an AC unit under the thermometers or pave with black asphalt.
Hey Science can't figure out that asphalt is hotter in the summer. Go five miles out temp drops a few degrees. Putting thermometers near asphalt is fake science.