Temperature Sensor at KSLC Correct?

Yesterday the temperature at Salt Lake City Intl. Airport reached or exceeded the 100 degree mark for the 22nd time this summer (June 1-Present). That breaks the all-time record for most 100+ degree days in a year for Salt Lake City, UT. Nearly all valley stations reporting to MesoWest yesterday afternoon were running below 100 degrees at the time the airport reached the 22nd 100 degree mark. This made me wonder. Is the temperature sensor reporting correctly? Have we really reached 100 degrees 22 times in Salt Lake this year

We know that the SLC airport ASOS is located at the lowest point of the SL Valley (4226 feet). It sits in a field that has no vegetation and is at the south end of the airport's runways 17/35 and  14/32. The no vegetation and nearby black topped runways could possibly explain why the temperature sensor at the ASOS typically runs about 2-5 degrees warmer than anywhere else in the valley. However, there is another weather station in close proximately that tells a different story. 

                                    KSLC and UDOT's Weather Station Valid: 8/17/2022 at 11:00 MDT

                                            Distance between KSLC and UDOT I-215@I-80

The weather station is located approximately 0.83 miles to the southeast of KSLC. It sits on the shoulder of two highways, in between the interchange of I-215 and I-80. The weather station is owned by the Utah Department of Transportation. I know this because I used to work for the company that maintains all of UDOT's weather stations and know for certain that the temperature sensor  at that particular site  is highly accurate and is properly position/calibrated. When comparing KSLC temperature data over the summer months to that of UDOT's station I-215 at I-80, I noticed some big differences.

KSLC's temperature reached or exceeded 100 degrees 22 times, while UDOT's weather station at I-215 and I-80 only reached or exceeded 100 degrees 5 times. Now UDOT's weather station sits at the same elevation as KSLC and is located right off the side of the highway in a field with no vegetation around. One would think the temperatures would be identical, but they are not. 

Daily high temps observed at KSLC and days where the high temp reached or exceeded 100 F.

Daily high temps observed I-215/I-80 and days where the high temp reached or exceeded 100 F.

Now the ASOS temperature sensor may be different from the one used by UDOT's nearby weather station, but the observed temperatures at both locations should not be that drastically different. It makes me wonder if the temperature sensor at KSLC is calibrated properly and if not, how valid is the claim, "SLC broke the all-time record by hitting or exceeding 100F 22 times this summer".