If June 21st is the longest day , why is it the not hottest ? Why does it not to get cooler after that day ?

Answer 1

It is only the longest day in terms of the amount of sunlight (in length of time) not the intensity of the sunlight, which depends mostly on air pressure, cloud cover and wind.

Answer 2

June 20 is also sometimes the longest day and if you consider times much long ago or what we expect well into the future, it can be as early as June 18 or as late as June 25. Close enough I suppose.

If your question is taken literally, the reason is that weather systems can cause that particular day to be warm or cold or neither (for the time of year). An interesting example is Summer Solstice of 2003 here in the Poconos. I take weather readings every day, and for this day the min/max temperatures were 52/56. 5 inches of rain fell that and the previous day ;) The maximum occurred very soon after midnight and the minimum occurred almost exactly at solar noon during a thundershower.

What you probably mean is why on the average this does not occur. The answer to that has basically already been said in among the previous posts - though the sun reaches its maximum extent to the north and the day is longest the day of the solstice, heat tends to build until the earth & atmosphere begin to lose more heat then they gain - though the evolution of seasonal weather patterns (movements of the jet stream, effect of tropical cyclones, etc.) also affect that.

The above is for the general location. There are reasons things may be different for specific ones. For example, the warmest weather on the west coast of the U.S. does not occur until late Summer or early Autumn because of its close proximity to the Pacific Ocean - the ocean retaining its heat longer than land. The opposite may be true for locations where vegetation becomes very abundant - the vegetation making the same type of day cooler than it would be earlier in the year when the ground receives more sunshine. For other locations such as India, monsoons cause the warmest time of year to occur before the solstice - when it is typically sunny during a day rather than wet.

Answer 3

He reason for this is that the earth is a large heat sink. It take a long time, all spring in fact, for the sun to raise the temperature from winter temperatures to summer ones. Even though after 21 June there is less energy available, it is still more energy than there is in the winter and in the northern hemisphere the earth is still absorbing energy that it lost in the winter from lack of solar radiation. An interesting twist on this is that Pluto is warming up even though it is moving farther from the sun on it's elliptical orbit. Though the earth doesn't get closer and farther from the sun to change seasons, the principle of the heat sink is the same. At the energy peak it has not yet overcome the heat sink effect, and must use the energy available afterwards to finish the job. One last point is that te days don't get significantly shorter until September, the 21st is the longest, but only marginally.

Answer 4

For the same reason that noon isn't the hottest part of the day. The amount of heat we're receiving from the sun is still greater than the amount that's escaping into space until about 2 or 3 in the afternoon. Now think of this in terms of a whole summer. Also, depending on what part of the world you live in, there can be other factors such as proximity to an ocean, which takes longer than the land does to warm up in the spring and then to cool down in the fall.

Answer 5

You have the build up of radiant heat within the bodies of water in the Northern hemisphere. As the days grow longer and the angle of inclination brings more of the Northern hemisphere into longer contact with the sun's rays, heat energy progressively builds up and is stored in bodies of water. Even after June 21st has passed, the heat build up will continue to rise until the angle of inclination tilts back far enough so that heat dissipates more than it accumulates in those bodies of water.

Answer 6

the most important impression on the united kingdom climate is the gulf bypass contained in the Atlantic. Its the gulf bypass that provides us our common winters (generally) and our cool rather moist summers. Water warms slowly and inspite of the actual undeniable actuality that the solar is maximum effectual in June, the sea to our west continues to be warming and so the triumphing westerly winds are nonetheless warming also and the proper effect is that July and August are frequently our warmest months with June and September cooler yet frequently similar.

Answer 7

Being the longest day does not mean the hottest day, because simply there are several factors contributing to make the weather hot - is it cloudy - is just one of them.

So, that also answer your second answer: why does it not to get cooler after that day... weather is the result of several elements: pressure, moisture, cloud, wind, etc. combine together.

Answer 8

there is a delay between the length of day and when the atmosphere heats up. the atmosphere continues to heat up as the summer goes on and eventually the shortening days begin to cool off the atmosphere. the same is true with the winter solstice. the atmosphere continues to cool as the winter progresses, but eventually the lengthening days catch up and the atmosphere begins to warm back up again.

Answer 9

Water temperatures largely affect weather. The seas, lakes, and oceans, heat up differently and slower than air, so there's always a lag.

Answer 10

there is a thermal lag.
you know how it takes a lake or pool a while to heat up (its not hottest at noon) or cool down (its not coldest at midnight). it works the same way with the whole northern hemisphere