I found some aerial photos of the CSU campus, showing land use changes around the Fort Collins weather station. The station has warmed about 4F over the last 100 years.
In 1937, the station was located in the middle of a farm,
By 1950, the area was starting to get built up.
By 1969, the city had surrounded the weather station.
Now it is in the middle of a parking lot.
Hansen tells us that UHI isn’t important, or has caused cooling.