The IAT (intake air temperature) sensor in the MAF (Mass Air Flow) housing is what the ECU uses to compute air density and temperature.
You can SEE this in the live data with any OBD reader that displays live data - it does not display that ambient air temperature as intake temperature varies from ambient air temperature due to the design of our intake (the intake tends to preheat the air, really poor design, that is why Needswings sells so many aftermarket intake kits).

Also, the Climate control has it's own sensors in the air flow of the heater-A/C that the climate control computer uses to operate the heat and A/C, so again, all that is there for is to tell you what the temperature of the air around is as you drive.