Why does high humidity make the temperature feel warmer?
Our bodies naturally dissipate heat by sweating. The evaporation of sweat off of our skin helps us to cool down. However, when the humidity is high, evaporation does not happen as quickly, and the cooling process is slowed down. This makes the temperature feel warmer to you with the humidity is high. Because of this, the heat index was developed. The heat index uses temperature and humidity to determine the "feels like" temperature.