Hail can appear to us, like rain, in many ways. Some have seen heavy hail fall, others have not. It can measure from a few millimeters to several cm. It always depends on how it was formed.
Before revealing the unknown, someone has noticed that in the moments before it falls, if at first it starts to rain (it does not always do so), are the drops of water very voluminous? If we go by car, it is the best time to see it. If suddenly it starts to rain with big drops against the windshield, has many numbers of accompanying hail. That or a good shower. In the case of hail, those "fat drops" are actually hail that has melted. It is just the previous moment of a cooling of the environment.
Hail forming
Training hail
Like rain or snow hail is formed from the evaporation of existing water on Earth. Seas, rivers and lakes are evaporated by the action of solar rays. Water vapor tends to rise due to its own temperature. Cold weighs and goes down, hot air is lighter and goes up. At a certain point, they cool, forming the first clouds, made up of small spherical drops of between 0,004 and 0,1 millimeters. Very small.
Depending on the colliding air fronts, the temperature can drop dramatically in the upper part of the troposphere. It is the area that goes from ground level, up to 10km high, where clouds also form. In the case of snow, it is at -1ºC, it is a slight cooling that leaves very crystalline flakes. Hail not, the drops freeze very quickly and at a lower temperature -15ºC.
It may be the case that the hail is very largeThis is due to the fact that some of the ones that started to fall melted, they join other drops, forming them even bigger, and the hot air that pushes them up again. All this causes them to refreeze and to an even larger size. Thus we see them fall with 3 / 4cm in size or more. And the larger the size, the faster the fall.
Why does it never fall at night?
As we have explained, the effect of temperatures. The warm ones usually occur during the day, not at night. At night, there is not so much evaporation, apart from the considerably colder soil.
All this causes the hail to go unnoticed. But yes, as in many cases, there have also been a history of heavy showers at night, accompanied by hail.
These are the reasons why hail is more of a diurnal than nocturnal phenomenon.
It will not fall at night in your house. A few have fallen here in recent years, and most at night.