Final answer:
The air south (behind) of a warm front is typically (a) warmer and more humid; on hot, dry days, evaporation cools the body effectively, whereas on humid days, the evaporation rate is reduced due to higher atmospheric water content.
Step-by-step explanation:
When comparing the temperatures and dew points between Lexington and New York City, considering the weather phenomenon of a warm front, it's important to understand the characteristics of the air on either side of the front. Typically, the air behind a warm front, which is to the south in this scenario, tends to be warmer than the air ahead of the front. Furthermore, this air is often more humid, given that warm air can hold more moisture than cool air.
When it comes to body cooling, humidity plays a crucial role. On hot, dry days, the evaporation rate of sweat from the skin is higher, aiding in body cooling. Conversely, on humid days, the higher concentration of water in the atmosphere reduces the evaporation rate, making it feel hotter as less body heat is dissipated through the process of evaporation.