I know that on a humid day,water vapour content is high in air and as a result evaporation of sweat is lesser and hence we feel hotter. What I am not able to get is, if water vapour content is high,how are clothes able to dry faster on humid days. Should'nt it take time for the moisture in them to evaporate?

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    $\begingroup$ Where does the claim that "clothes dry faster on humid days" come from ? Is it documented ? I'm not saying it has to be wrong, but just that it is far to be an obvious observation for me (maybe it's on me). Please also consider that the drying kinetics are quite complex, and that other factors can impact the speed (temperature, air circulation...). That may bias your observations if your claim is mostly based on a "it seems to me that..." $\endgroup$ Nov 22, 2018 at 11:36
  • $\begingroup$ It's just my observation as summers are naturally more humid because of high temperature and clothes dry faster here in summers. $\endgroup$
    – Shwetha
    Nov 22, 2018 at 11:55
  • $\begingroup$ Are you sure that your summers are more humid? You should measure it. Personally, I see all summers hotter and drier, except for us and our sweat, but the environment is dryer. $\endgroup$
    – FGSUZ
    Nov 22, 2018 at 12:01
  • $\begingroup$ Man I wish this was the case for me $\endgroup$ Nov 22, 2018 at 12:02
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    $\begingroup$ But that is not correct. Hot air is not necessarily more humid. Humidity is no related to temperature in general. I can easily heat a pressure container full of air so it becomes more hot without having any humidity added or removed. Take a trip to Vietnam with high humidity due to their rainfalls and closeness to open water, and then go to Death Valley in the USA, the hottest place on Earth, that is immensely dry since it is so far from water sources. Try to hang your clothes to dry in either place and you'll see a difference. Humidity and temperature are in general two unrelated parameters. $\endgroup$
    – Steeven
    Nov 22, 2018 at 12:30

1 Answer 1


What I am not able to get is, if water vapour content is high,how are clothes able to dry faster on humid days

They don't. They definitely dry faster on less humid days, assuming the temperature is the same in both cases. If you put clothes out in the Altiplano they dry real fast, which is great at the end of the day and hang up your cycling jersey and its dry before you get your socks off.


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