Yeah it’s probably very based on location. Like maybe DIT doesn’t even see frost until 20s because it’s breezy on a hilltop?
I do agree that Joe Schmoe sees frost outside he thinks it’s 32F outside, whether it is or not. He’s telling his friends it got to freezing even if he had a Davis and it had a min of 34.4F but his grass, car, and neighbor’s roof is white. My wife thinks it’s freezing, then I tell her the low was 34F and she’s confused… so I just say yeah must’ve been freezing .
Experiences all cloud our opinions, a suburban neighborhood, a mixed hilltop or a radiational area will all see it slightly different.