Unless you use the NOAA Climate Reference Network, which is closely monitored and maintained. Since it was built 15 years ago, it has shown no increase in temperature. This led to the publicly maintained network of weather stations to be inspected, which led to the discovery that many are improperly installed, not maintained (leading to extrapolation using nearby weather station data), painted dark colors, installed near equipment that radiates heat (like air conditioners), or installed near objects that collect heat (like parking lots).