The body sweats in order to get rid of excess body heat. When the humidity is high, the sweat won't evaporate, and you body is still hot despite sweating profusely. To determine whether it is more humid and hot outdoors, you need to measure them with scientific instruments, instead of using your impression or assumption. To give you a classic example, if you put your left hand in cold water and right hand in hot water, and then you put both hands in the same body of water, then your left hand will feel warm and your right hand will feel cold. Subjective feeling therefore is not as reliable as objective measures.