The average temperature trend in Grand Rapids, Michigan shows warming of about only 0.4 degrees F over the 120-year record from 1898 through 2017, according to NOAA online weather data for the station. The relatively small increase combined with the recency of the highs for the data series, however, makes one wonder about possible interference from developing heat island effects at the station, which is located near the increasingly busy Ford International Airport.
The Intergovernmental Panel on Climate Change figure of 1.53 degrees F is referenced here.
The data for Grand Rapids is shown below.
