Originally Posted by
terrymorse
Those Garmin readings are easily refuted as overly high. All you need to do is compare them to the official temperatures. I've often seen readings 5-10 degrees higher than the official temperature, but of course I don't believe them.
Also, the standard height for surface air temperature measurement is 2 meters (I don't know where the 30 feet comes from).
A local weatherman long ago used to try to teach viewers when he had time. Harold Taft basically invented television weather forecasts after he returned from WWII so I tried to learn what I could as a kid.
In case we wanted to setup a home weather station he taught us that temp was taken 4’ high in shade. Back then the thermometer used was in a large wood box with louvers for air flow.