"This is all going to depend on where you are getting your weather data from. The truck is probably more accurate than you think unless you've got a weather station at your house or are pulling local weather data from someone who has one running on weatherbug or weatherunderground, etc. "
My 2021 Silverado will display readings of outside temperature in the mid +50's, and then -45 within 10 minutes of each other. Currently it is reading +45 outside during an actual blizzard when I know it's in the teens outside in Traverse City, MI.. So, no.. I don't believe the truck is more accurate than I think.