The displayed ambient temp on our 2014 RTS was kind of close, but certainly not accurate.
As an experiment, I relocated the temp sensor inside the airbox, just prior to the air entering the actual air filter.
What an eye opener that experiment was. The temp of the engines intake air was far hotter than the temp displayed with the sensor at the oem location. Add to this, if the 2 airboxes heat soak while parked, or in traffic, they took a long time of non stop riding, to cool and get close to the lower temps the oem temp sensor location indicated.
Interesting. I probably won't fool with it, who knows what the engine management software does with that value, and if it read differently than what it's currently doing might mess up other stuff. I'll just remember to deduct about 10 degrees from what's shown to get the "real" temperature I guess.