why is it that air is colder at night than that in day time?
814462
The sea, air, and land are all warmed by radiation (light, infrared, etc) from the sun during the day.  The earth also gives off radiation (infrared) all the time.  During the daytime the radiation from the sun is greater than the radiation given off by the earth's surface so the surface warms up.  At night, no radiation from the sun, but the earth is still radiating infrared, so it cools off.
757939
Wind usually lays down at night but not always
167189
It has to do with light scattering by molecules in the atmosphere...this question is asked almost every 12 hours, check the old questions to have a good answer
563639
huh?\n\nSome of the InSolAtion is trapped by the clouds. Esp. at night co heat up the Earth's surface.  \n\nAlbedo: Clouds absorbing the light
160386
It's not a matter of cold air moving toward warm air, but a matter of the air trying to find equilibrium. Cold air is denser than warm air, and cold air sinks while warm air rises. That's why we feel wind - the colder air rushes in to fill in the less dense air and create an equilibrium.\n\nThis may not be the most meteorologically correct explanation, so any weather people are free to enhance or correct it.
194124
Because the air spreads out, and as it spreads out it retains less heat.\n\nAnd while cold air does sink and hot air rises, as cold air does get lower in altitude it warms up, and hot air cools as it rises. \n\nI live in the foothills west of Denver so I see the rising/falling air thing firsthand. In the winter we get this air that 50 miles to the west was part of a blizzard. As it descends the mountains, it dries out and heats up sometimes bringing temperatures in the middle of the winter into the 60's or 70's.
667963
It's polar night in winter when the sun is sufficiently below the horizon, so that there is insufficient sunlight or no light at all. (A lingering dusk may occur, if the sun is only 12 degrees or less below the horizon.) \n\nA common misunderstanding is that at each point inside the polar circle the shortest day is totally dark. Because of twilight, this is not the case.\n\nSince the earth's axis is tilted with respect to the ecliptic by approximately 23 degrees 26 minutes (commonly rounded to 23 degrees and a half), the sun does not set at high latitudes in (local) summer. The duration of the midnight sun increases from one day during the summer solstice at the polar circle to approximately six months at the poles. At extreme latitudes, it is usually referred to as polar day. The length of the time when the sun is above the horizon varies from 20 hours at the Arctic Circle and Antarctic Circle to 186 days at the poles.
654750
No its not necessarily closer to the sun(visit usgs.org) and even if its closer, it may be closer by 0.000001%.What big difference does that make.Its the difference in air pressure that makes the peaks colder.The higher you go up in the earth's atmosphere,the pressure decreases.And even an object 90% closer to the sun may not be that hot.
1100487
Because the earth orbits the sun in the same direction as its daily spin, we are on the "trailing" side of the globe before midnight. This means that meteoroids must "catch up" to us in order to burn up in our atmosphere, and will be slower (and so fainter) when they do. After midnight of course, the situation is reversed... The result is that you usually see many more meteors near dawn than near dusk!
684212
the weather is pretty cold because it it far from the sun.It's temperature is -214 C.Its atmosphere is mainly made of hydrogen and methane gas.It has seasons different from us because it is tipped over its side
214499
It all has to do with altitude. The higher you are from the earth, the colder it gets. Air is also thinner.
937495
We do have them in the day, just they not show up as well. Many seem more numerous before dawn, because they best seen then or the angle they hit the atmosphere at that time. All I know.
520556
Several reasons:\n\n1.)  Close to the Sun, as aforementioned.\n\n2.)  Its solar day is very long (176 days from sunrise to sunrise), which means there is a lot of time for the surface to heat up during the day, and to cool off at night.\n\n3.)  There is no atmosphere to redistribute the heat around the planet, and thus equalize the temperature somewhat.
685459
This happens to many people, though the symptonms are different. many of us who generally sleeps in a room, will get 'good' cold when made to slept under open sky.\nThis is due to the changes in temperature (though mild) during the second part of night. Cold generally occurs during change in season (temp. change)\nYou are the type of person who gets cold easily, so i advise you not to sleep that way, or have a thin bedsheet to cover your body. Also have lots of citrus fruit to increase your immunity against cold.
29409
Well that's sort of subjective. A clear, cloudless night is likely to be colder, simply because clouds create sort of a "blanket" so to speak covering the ground from the most frigid of air. That's why desert nights can be so devastating. \n\nHowever, if you're talking about cloudless nights with or without stars, it makes no difference. One of the biggest reasons we cannot see the stars too well is simply light pollution. If we're near a city, the lights that go up reflect and block virtually all of the night's stars. \n\nSo basically, it's impossible for me to say beyond that without clarification.
439007
During the day, the sun heats both land and water. Because it takes more energy to heat one molecule of water than it does to heat the land, the water is in comparison much cooler to the hot atmosphere around it. hence the reason water feels cooler than the hot atmpshpherearound it.\n\nSince land takes in more heat and releases it more rapidly than does water, at night the reverse is true. while the land has cooled off during the night the water is unable to cool as quickly so it feels warm.
1005078
oxygen, because they need it for cellular respiration, just like we do.  In order to use CO2, sunlight has to be present.  Therefore, they don't use CO2 at night.