Car temperature sensors tend to be inaccurate because they're often in the Sun or some other place affected by baking a car not in a garage.
Check a thermometer in the shade. The weather data stations reported an average of 101 ℉ / 38 ℃ for Waco. It's hot, and especially feels worse with Southern subtropical humidity. OTOH, 101 in California with 0-15% humidity, it would just be a bit annoying. Higher humidity makes heat qualitatively exponentially worse until it's a sauna.
I think mine is under the car, so it registers temps near the road, which can be hot (asphalt in the sun). It’s usually 3-6 degrees (Fahrenheit) high.