The sweat absorbs the heat from your skin in order to evaporate.
No, sweat evaporates more slowly in high humidity environments as the air is already saturated with moisture, making it harder for the sweat on our skin to evaporate.
It does, that's the entire point of sweating.
It is actually not a matter of sweating more but of it being more difficult to evaporate the sweat. If you are in a dry and windy place it is very simple for sweat to evaporate, in a more humid area there is more water in the air already and therefore makes evaporation of the sweat much more difficult. Then it would appear that you sweat more because you are seeing the sweat, however it is a matter of evaporation.
Yes, you can still sweat in 100 humidity, but the sweat may not evaporate as effectively, making it harder for your body to cool down.
We do not sweat more before rain. However, if rain is coming, there is a good chance that the air is rather humid. In humid air our sweat does not evaporate as quickly, making it more noticeable. To summarize, when it is very humid outside the air is already saturated with water making our sweat evaporate much more slowly.
37%
The sweat glands are more numerous under the arms, and the moisture produced there does not evaporate as quickly as on skin exposed to the air.
On hot and sticky days, the humidity in the air is high, which means there is already a lot of moisture in the air. When sweat is released from the body, it cannot evaporate as easily because the air is already saturated with moisture, leaving no room for additional evaporation. This can make you feel sweatier and sticky because the sweat is not able to effectively evaporate and cool you down.
You will sweat the same on both days if your activity is the same. It will evaporate faster on a dry day, so you will notice less sweat on a dry day.
indirectly. dark cloths absorb more light and heat and so get warmer which causes you to sweat and evaporate more sweat.
People actually sweat the same amount on a humid day as they do a cold, dry day. The difference is that the sweat isn't able to evaporate as quickly because of how much moisture is already in the air.
One of our body's mechanisms to cool us down is to sweat. In a low humidity environment the sweat can evaporate, absorbing extra heat from our body to help cool it. In high humidity, it is much more difficult - or impossible - for the sweat to evaporate and thus we can't get the benefit of the evaporative cooling.