How does cloud affect a region's temperature at night?
339878
Heat likes to rise. If there are clounds, they keep the heat in. On clear nights, the heat can rise up and away and it gets colder.
22072
Clouds aren't just random droplets of water. What they are is tiny droplets of water that have condensed from water vapor in areas where the conditions (temperature, air pressure and humidity) are exactly right. Anywhere where you have the correct combination of these conditions, you'll get a cloud. Anywhere that you don't, you don't.\n\nAreas with this kind of conditions don't occur in random tiny places. Instead, there will be a large area of one condition that gradually shifts into another. (If this doesn't make sense, think of just temperature. You don't get a different temperature at every spot on the globe. Instead, you get a large area of warm air that gradually shifts into a large area of cooler air. The same is true for air pressure and humidity.) This is why you get a large area of 'cloud' in one place and nothing at all in another. You can think of clouds as being physical maps of the weather conditions in the sky.\n\nThis is also what holds the clouds up. In general, if a cloud is high up in the sky, the conditions just below it aren't right for the cloud to form. As the water droplets fall, they reach areas with the wrong temperature or pressure and evaporate again. Only if the clouds become densely packed enough for the water to form large enough droplets can the droplets fall to the ground. Not all clouds form high up, either... sometimes the right conditions can occur at groundlevel, giving us fog.
18994
a night with no stars is due to the cloud cover. this covers also prevents the pollution,air and other gases from going up.which results in warmer nights.a night with stars is cooler
159589
A typical cloud drop, remember only 2 one-thousandths of a millimeter, requires an updraft of 0.02 miles per hour, or 1.  1.8 feet per minute to stay aloft. On the other hand if there is no updraft the typical cloud drop will fall at .02 miles per hour, this is called the terminal velocity (sometimes referred to as the "fall speed").\n\n\n2.The South Pole has about six months of darkness and six months of light. Technically, the Sun sets on one equinox (March 21) and rises on the next (September 21). That amounts to 184 "dark" days. Sunrise and sunset occur when the apparent upper limb (edge) of the Sun is on the horizon. \n3. the speed of light = 186 282.397 miles per second\n4. The Nile is the longest river in the world, stretching north for approximately\n4000 miles from East Africa to the Mediterranean\n\n5. Baikal has the largest surface area of any freshwater lake in Asia (31,494 km²/12,165 miles²) and is the deepest lake in the world (1637m/5369 ft—previously measured to 1620m/5314 ft). Therefore, in Russian tradition Baikal is called the "sea", and in the Buryat and Mongol languages it is called Dalai-Nor, or "Sacred Sea".\n\nHow hot is the sun?\nThe surface of the sun is about 10,000 degrees Fahrenheit (5,770 degrees Kelvin). That may seem mighty hot, but it is even hotter deeper inside the sun. \n\nWhat is the temperature of the sun's core?\nThe sun's core is extremely hot — about 27 million degrees Fahrenheit (15 million degrees Kelvin). That is because of the tremendous pressure of the weight of the sun pressing down on the core — equal to 333,000 Earths. In pounds, that is 9 followed by 29 zeros!\n\n"Surface Area: Land area, about 148,300,000 sq km, or about 30% of total surface area; water area, about 361,800,000 sq km, or about 70% of total surface area."\n\n\ndigested and pass through the intestine in about 4 hours. Whereas protein\nfood (meat, beans, nuts, etc.) takes about 7 hours. \n\n\n It is thought that the Sun is about 5 billion years old, and is about halfway through its main sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. In about 5 billion years time the Sun will evolve into a red giant and then a white dwarf.[2]\n\n\n\nFacts about the Oceans\nArea: about 140 million square miles (362 million sq km), ore nearly 71% of the Earth's surface.\n\nAverage Depth: 12,200 feet (3,720 m).\n\nDeepest point: 36,198 feet (11,033 m) in the Mariana Trench in the western Pacific.\n\nThe eyes can perceive more than 1 million simultaneous visual impressions, are able to discriminate among nearly 8 million gradations of color, can distinguish about 500 different shades of gray, and take in more information than the world’s largest telescope.  Each time the eye blinks, over 200 muscles move and you blink 25 times a minute or over 6 million times each year.
564661
Forest and the trees perform a lot of functions to receive more rains. There is always evaporation of water vapour from the leaves which will become clouds and then precipitate into rain during the night or at cool climate.  The climate becomes almost cool during night time and cause the rain.  All passing clouds are interrupted by the tall trees and cause rainfall because of the cool climate there.\nThe humidity in the air in forest areas also cause more clouds and also cool climate.  It is almost cyclical. The soil becomes more fertile because of the leaves, animals and insects and helps more plants.
39120
The darkness is the extra water vapor in the clouds.
141597
If there was no sunshine and no vertical air motion, cold air would settle to the surface, and temperature would increase going up in the atmosphere (and we'd all be dead soon ;) ). Because the ground is always radiating away heat (though often receiving more during daytime from the sun), there is a tendency for that to occur. Note the polar regions for example - during winter there is a semi-permanent temperature inversion (increase of temperature with altitude).\n\n2 things which counter the tendency for inversion are solar heating and vertical air motion.\n\nSunshine heats the ground, heat is conducted to air directly above the ground, and convection transports it up into the atmosphere. Cooling/heating of air by radiation is a slower process, so heat builds as spring and summer progress (at mid & high latitiudes) - especially in the lower atmosphere.\n\nAir moving vertically in the atmosphere (up or down) does so at the adiabatic lapse rate, which is 10 °C per km for dry air and less for saturated air (varies depending with temperature - averages about 6-7°C per km). Rising air cools at that rate, and subsiding air heats at the rate. Thus vertical air motions act to heat the lower atmosphere and cool the higher.\n\nThe combined effect of those, as a few people mentioned, is that temperature on the average decreases with altitude in the troposphere - at a rate of 6.5 °C per km (3.6 °F per 1000 ft.). Yet the lapse rate varies depending on conditions. Air during a clear night normally increases directly above the surface, strong inversions may occur during winter and ahead of warm fronts, and air can decrease at the dry adiabatic rate or briefly greater during a warm, sunny spring day. Etc.
404328
For clouds to form the air has to be unstable, meaning that the air at the surface is warmer than the air above. Remember the saying warm air rises? So when the air rises it hits a level called the Lifting Condensation Level or LCL. If the air rises to this point it then can start to condense on particles in the sky forming clouds.
12325
Another individual stated that the clouds act as a blanked and keept the earth warm.  That is an accurate answer. So, let's look a little deeper.\n\nFirst, clouds are the formations of moisture.  The thicker the clouds, the more moisture that is in them. \n\nNext, remember that heat rises.  During the day, the earth is warmed.  It cools at night.  The heat rises into the air.\n\nWater has a high specific heat, meaning a large amount of energy is needed to heat the water.  Likewise, it take a long period of time to cool the water.\n\nAs the clouds cover the earth, they are insulating the land.  Thus when the heat rises, it hits the clouds creating a barrier.  Thus the rate of cooling is slower than when there is not any cloud cover.\n\nPlease note there are exceptions to the rule.  We've all seen or heard of snowstorms coming in and the air is cooling very quickly.  But the general rule is that on a cloudy winter night, the temperature will not drop as low as if there were no clouds.  And you are less likely to scrape frost from your windshield.
5861
No.  The cloud will form when the ambient temperature inside the cloud is lower than the dew point.  The moisture may actually form snow (on a summer day!) which melts on the way down to form rain.  The temperature outside the cloud may be less relevant because clouds often form when a column of moisture-laden air rises locally condensing into a  cloud right above the column.
1120130
Given its distance form the Sun I doubt there would be much difference between day and night. but one site I found said that its ranges from between  -378 to -396 F (or -228 to -238 C).
818992
Cool - you seem to have really interesting weather.\n\nYes, if there is a 1000 foot difference between you & the town 7 miles away you will certainly experience different weather in some situations - and typing in your zip code for an online forecast generally will not help - to my knowledge the type of meso and micro scale effects you mention are not included in any of them. You really have to learn how your local weather differs from that at surrounding areas (which are forecast for) for specific situations.\n\nFor example, when the temperature is near the dewpoint with storm systems affecting your region, the cloud base in town can be below 1000 feet and below you. There are many orographic effects on the microscale - mountain-valley breezes, and the extra elevation can in certain situations cause showers to occur over you but not them. After a cool & clear night, you may become warm quicker than the town does - cool air persisting in the valleys longer after sunrise - then they'll become quite a bit warmer than you during afternoon.\n\nThough the NWS attempted to place the doppler radars at locations for the best overall coverage, some mountain locations still cause problems. The base reflectivity images you typically see when you look at a "radar map" are obtained using a beam tilted .5° above horizontal. If the precipitation is occurring primarily below that or there is an intervening mountain, you may get a small or no signal. That is much more common with snow rather than rain showers because low & rather thin clouds can sometimes produce them. Raindrops generally need a much greater vertical distance for the water droplets to combine and become large enough to fall out of the cloud. Ice crystals can float around horizontally much more and do that.\n\nSo there are many possibilities, but I would have to know exactly where you are to say anything specific.\n\nI saw something cool visiting Clingman's Dome in Tennessee one September. It was a sunny day, but on the road to the summit there was a large low area in amongst the mountains over which a cumulus cloud had formed. Became cloudy for a few minutes as we passed by then was sunny again. On the way back down a few hours later, the cloud was still there. There were a few small cumulus clouds here & threre occasionally, but some orographic circulation evidently caused that cloud to form & persist much of the day. Was a warm day - I am guessing a little over 80° even at the summit.
570098
Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals. This can happen in three ways.\n\n1. The air is cooled below its saturation point. This happens when the air comes in contact with a cold surface or a surface that is cooling by radiation, or the air is cooled by adiabatic expansion (rising). This can happen\n\nalong warm and cold fronts (frontal lift), \nwhere air flows up the side of a mountain and cools as it rises higher into the atmosphere (orographic lift), \nby the convection caused by the warming of a surface by insolation (diurnal heating), \nwhen warm air blows over a colder surface such as a cool body of water. \n2. Clouds can be formed when two air masses below saturation point mix. Examples are breath on a cold day, aircraft contrails, and Arctic sea smoke.\n\n3. The air stays the same temperature but absorbs more water vapor into it until it reaches saturation.\n\n\nand there's lots more at....
739578
this is a weather term - it means an area of high pressure, leading to little or no clouds in the sky (i.e. hot weather in the summer, or cold nights in the winter).
215716
Concrete, glass, steel etc all absorb heat from the sun, when the temperature drops they act like radiators giving off heat.  The bigger the city the more heat it retains and so large cities such as Tokyo, London, New York can be several degrees warmer than the surrounding rural areas.\n\nIf you're ever out in a rural area on a cool night at the end of a hot day try walking on the road then walking on the grass - there's a marked difference in temperature - that's why cattle, sheep etc often congregate on roads in the evenings.\n\nCities also generate much more heat from motor vehicles, industry, heat escaping from buildings and even (to a small extent) the people in them.\n\nAdditionally, cities create pollution and this acts as a barrier which traps heat in and locks colder air out.\n\nThere's also the fact that cities tend to be at lower altitudes and for each 150m gained the temp drops by 1 degree C, and they're less windy than more exposed rural areas so it's harder for cold air to penetrate into a city.
959944
It's because the thinner atmosphere at the higher altitude holds less heat.  The atmosphere and its greenhouse effect is the reason why the night side of the Earth is not frozen, because the atmosphere holds infrared radiation given off by the Earth after it is irradiated by the sun.  But at altitudes where the atmosphere is thinner, it is able to hold less of that warmth.
86687
Nothing. A slight change in temperature if that. Kind of like a cloud going over the sun. All it is after all is a shadow passing across the sun.