When the water drops get high enough in the sky, they encounter the colder temperatures at higher altitudes and freeze, even in the summer. A lot of the rain drops we experience in the summer started their existence high in the sky as snowflakes but melted before reaching us. In fact, even in the summer some of the clouds you see are composed of ice crystals. Clouds have no problem existing in the cold of winter, because they can just exist as ice crystals. In fact, the same cloud can be partly composed of water drops and partly composed of ice crystals. Clouds can also be composed of ice crystals. Secondly, clouds are not always drops of liquid water. But when the air outside is cold enough, the water vapor you breath out quickly condenses to little drops of liquid water and you see your breath as a small could. You don't usually see your breath because the vapor you exhale stays in the gas state. For instance, with every breath you exhale, you are blowing out water vapor that has evaporated from your lungs.
The water drops or ice crystals in the air are usually too small for you to see them individually, so instead you see a white or gray haze. Whenever you see steam, mist, fog, or clouds, you are seeing small drops of liquid water or crystals of ice, and not water vapor. Water vapor is invisible because its molecules are too far apart to optically scatter light.
Baird.įirst of all, clouds are never made out of water vapor. Public Domain Image, source: Christopher S.
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