* Humidity: Rain makes the air humid, which can interfere with the chemical process of perming. Humidity can cause the solution to be less effective, leading to uneven results or a weaker perm.
* Moisture: Wet hair won't absorb the perm solution as well, potentially leading to the same issues as humidity.
* Drying time: It takes longer for wet hair to dry, and the perm solution needs to be on your hair for a specific time to work properly. This could make the process take longer and possibly lead to damage.
Instead, it's best to schedule your perm appointment on a dry, sunny day. This will ensure the best possible results for your perm.
If you're caught in a downpour and already have a perm appointment, be sure to communicate with your stylist. They may be able to advise on the best course of action, potentially even rescheduling.