I've been to Saudi Arabia and it was really hot during the day, cool at night but wearing black was very comfortable. I think as we're not wearing several layers either and it is really loose and flowy.
Jinns can lurk in toilets that's why we have specific prayers when entering and leaving the loo:
Before entering it is O Allah I ask you for protection from the male and female jinn
It's not like something WILL happen to you if you don't pray it but just like humans jinns also have naughty ones amongst them (eg those who enter the body of a human which is against their rules) and so just like how we eat and say in the name of God and with the blessings of God, we have prayers for the loo, for hot weather, cold weather, drinking zamzam, etc etc. and as we're taught it from a young age it becomes a part of you. We even pray when we have exams! Eg Allhumma zid fazid (O Allah increase my knowledge).
Hence it isn't a cultural thing but we have been taught from the Qur'an and the way of the Prophet Muhammad peace be upon him and those around him (men and women).
I may have different answers to others but I did study Islam in depth sort of like how imams do, well quite alike to be honest.
We have prayers for everything and even praying to protect ones home.
If I elaborate on the jinn part, we're recommend to read version from the 3rd chapter of the Qur'an (Surah Aal Imran) to keep them out.
It's not like they bother all people but they can and do to some. Jinns are like kids though, if you speak up and tell them to get lost they will. But I've not had to encounter that myself.
I mean we have prayers for when we are ill in Arabic (O Lord of the people, you are the Curer, there is no cure except with your will, such a cure that will not miss its target, cure me) and you read it 7 times whilst placing your hand on the place that is affected (like the head when you have a headache)
When we travel we have a prayer to pray for a safe journey.
To be honest it feels like a lot of love around that no matter what weather, health, situation you have God there with you and you have faith in Him. It doesn't feel like a burden. I've been non religious at a point in my life and came back when I realised how this world just doesn't feel right and really there is another world and that's what we are working towards.
Anyway I digress! The point of the post is that we believe there is a God, Prophets, Angels, Satan, Jinns - some who are in Satans army and some who are also believers, there's this world and the next. We wake up with a prayer thanking God for another day in life and a prayer at night, and all that in between for various different reasons. Of course not everyone does it but the more you study your own religion and believe in it the more you will understand it especially through life experiences.
No one's better than another but you'll see Muslims at various stages of their lives and one cannot represent another but it's good to find a local male or female scholar and learn about it in depth like a study subject, it'll probably be very different to what you learn in school!