A good point, and the fundamentals of all the religions started out as a guide of how to be a good person, and survive in your territory. All religions have a 10 commandments of sorts. Some of the eastern religions like Buddhism that go on pilgrimages up mountains originate in hot humid climates. Journey up this mountain and achieve enlightenment, well the air is clearer and cooler than you're used to, you have exerted yourself so are generally that bit fitter and healthier, it feels good. All religions have aspects like this that change with the location.