A good example of how the sun can warm the inside of a dome is to compare it to a car. This occurs even on overcast days as the ultra-violet rays from the sun will actually penetrate through the clouds. Once inside, one of the first things you will notice is the actual interior size of the unit. The moisture content in the inside air of the unit is noticeable but not unpleasant. On colder days the moisture content in the air will rise and can form water droplets on the ceiling.
Steam coming off of the pool water is possible on very cold days.
The movement of the air within the dome is very slight and norm- ally it is not felt by the users. Isolated from the rest of the world, but only a step away from your home.