Rush recalled a poor paint job that resulted from cool outside temperatures and high humidity. Interestingly, the result wasn't yellowing, per se. You have to take into account all the environmental conditions that can affect your work. For example, a building may be heated during the day while you work, and stay within the recommended temperatures for applying paint. But if the heat is off at night, the lower temperatures may impede proper curing of both the drywall mud and the paint.
Air flow is important too, especially in small rooms.
If the room is too tight, then the water evaporating from the coating increases the room's relative humidity and inhibits the paint's drying process. First, contrary to assumption, a coat of texture is not a substitute for a primer. Secondly, some textures react with the drywall paper, causing a world of problems. If you spray a coating over the texture, you may get lucky and the color won't migrate, or you may not. Copies are available from these associations and many drywall suppliers.