Why does steam come out of a person's mouth in winter?

Written By ندى ماهر عبدربه on 2023/12/07

This article was written originally in Arabic and is translated using a 3rd party automated service. ArabiaWeather is not responsible for any grammatical errors whatsoever.

<p style=";text-align:left;direction:ltr">Arabia Weather - While walking on a winter morning, due to the humidity of the atmosphere and rainfall, some may wonder why water vapor comes out of their mouths, which arouses their curiosity to know the reason behind this strange phenomenon, and <strong>the “Sciencing” website</strong> explains the reason for this phenomenon.</p><p style=";text-align:left;direction:ltr"></p><h2 style=";text-align:left;direction:ltr"> Why does steam come out of a person&#39;s mouth in winter?</h2><p style=";text-align:left;direction:ltr"> Water vapor is a form of water in a gaseous state, and is often invisible unless the temperature causes it to condense. Condensation occurs when the air temperature decreases, as invisible water vapor transforms from the gaseous state into small particles of liquid water, and this transformation appears In the form of steam rising from the mouth, this is due to filling the lungs with moist air, which turns into water vapor flowing from the mouth.</p><p style=";text-align:left;direction:ltr"> The process of expelling steam from the mouth occurs as a result of the properties of air saturated with water vapor inside the body. When cold air is inhaled, it condenses and rises in body temperature. When the hot air resulting from exhaled breath meets cold air, condensation of water vapor occurs, resulting in Water vapor comes out during the exhalation process. An individual can clearly see this phenomenon when standing in an area with low temperatures, and while taking a deep breath and exhaling slowly through the mouth, where water vapor appears clearly, and its density increases noticeably in cold weather. </p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"><img alt="" src="/sites/default/files/uploads-2020/%D9%84%D9%85%D8%A7%D8%B0%D8%A7%20%D9%8A%D8%AE%D8%B1%D8%AC%20%D8%A8%D8%AE%D8%A7%D8%B1%20%D9%85%D9%86%20%D9%81%D9%85%20%D8%A7%D9%84%D8%A5%D9%86%D8%B3%D8%A7%D9%86%20%D9%81%D9%8A%20%D8%A7%D9%84%D8%B4%D8%AA%D8%A7%D8%A1%D8%9F.jpg" style="width: 800px; height: 533px;" /></p><p style=";text-align:left;direction:ltr"></p><p style=";text-align:left;direction:ltr"> Read also:</p><p style=";text-align:left;direction:ltr"> <a href="https://www.arabiaweather.com/ar/content/%D8%A7%D9%84%D8%AD%D9%81%D8%A7%... warm and healthy... Tips for staying safe in cold weather</a></p><p style=";text-align:left;direction:ltr"> <a href="https://www.arabiaweather.com/ar/content/%D9%83%D9%8A%D9%81-%D8%AA%D8%A8... do you stay warm without a heating source at home?</a></p><p style=";text-align:left;direction:ltr"></p><hr /><p style=";text-align:left;direction:ltr"> Sources:</p><p style=";text-align:left;direction:ltr"> <a href="https://www.loc.gov/everyday-mysteries/meteorology-climatology/item/why-... style=";text-align:left;direction:ltr"> <a href="https://www.youm7.com/story/2018/12/28/%D8%A7%D8%B9%D8%B1%D9%81-%D8%AC%D...

This article was written originally in Arabic and is translated using a 3rd party automated service. ArabiaWeather is not responsible for any grammatical errors whatsoever.


Browse on the official website



The history of perfumes and the secrets of choosing the best men&#39;s and women&#39;s fragrances according to the seasonNovember in the collective heritage of the Arab EastJordan: The low-pressure system&#39;s impact will be renewed at dawn and during the day on Wednesday, with its concentration in the south of the Kingdom.Saudi Arabia: Special bulletin on rainfall forecasts and areas prone to snow on WednesdayOngoing updates: School hours delayed until 10 AM in these areas Tafilah: School start time delayed until 10:00 AM on Wednesday due to weather conditions.UAE: Will the upcoming weather system be accompanied by the appearance of the green cloud?Saudi Arabia: A very cold air mass brings significant weather changesJordan: First snowfall in the highlands of southern Jordan at dawn and on Wednesday morning, December 17, 2025