Originally Posted by
Seattle Forrest
Edge units have a thermometer in them. Anything with a barometer does, you need to know the temperature of the air you're measuring to determine altitude from pressure.
https://support.garmin.com/en-US/?fa...nZ99DcunfAue66
The barometric altimeter is not temperature compensated. Temperature changes in the measuring device will affect the barometric pressure sensor and altimeter readings.