United Kingdom
It depens what the laws are in your country. Here in the UK - there are specific health & safety laws regarding minimum temperatures for buildings. If a school couldn't maintain the legal minimum temperature, it would have to close temporarily.
United States
Sometimes. If temperaturs are bitterly cold, that and other factors would be considered. If school district administers determine that the conditions pose possible dangers for students, schools could be closed.
To learn how to find out if a school in the UK, US, or other country is closed, visit this question: How_do_you_know_if_your_school_is_closed_due_to_inclement_weather_on_a_certain_day
Only bitterly is an adverb, modifying cold which here is an adjective referring to weather, temperature, or wind.
With bitterly cold temperatures forecast for a large area of the country, it is not only likely that schools will be closed, but some schools announced closings on Saturday, January 4, 2014.To find out if a particular school is closed: The best source of information for school closings in the United States is usually the local T.V. and radio stations. Radio stations almost always announce the list of closings they receive every few minutes. Television stations usually run an ongoing list of closings across the bottom of the screen or show the list every few minutes. Closings might also be posted on their websites and possibly on the school district's or individual school's websites.Related Questions:Will Chicago Schools be closed on Monday January 6 2014?Why did Governor Mark Dayton order all Minnesota schools to close on Monday January 6 2014?Do schools close when the temperature is bitterly cold?
The bitterly cold temperature is the main one.
No, there are deserts where the temperature is always bitterly cold and deserts where it is always cool. Heat does not determine a desert. Lack of rainfall determines a desert.
Laws for school closings, as far as is known, involves making up days that are missed due to weather, not about actually closing schools for weather related causes. The decision to close schools for weather is made by each school district based on weather conditions and keeping students safe.
Cold or cold winter deserts may have temperatures quitr hot in the summer but can get bitterly cold in the winter. Examples: the Great Basin Desert, the Gobi Desert.
icy
Lake Eyre's climate is consistently hot and dry all year around. Winter nights are bitterly cold.
tundra
Usually, states do not have a set temperature for closing schools. The decision is made by considering overall conditions and whether the safety of children would be threatened. If you have concerns about school closing due to bitterly cold temperatires, follow the same procedures as you would for snow closings; tune in to your local television and radio stations.
The Gobi Desert is a cold winter desert that has hot summers and bitterly cold winters. The Atacama is a cool coastal desert with no temperature extremes. It is mild all year.
Just don't live in cold countries and it won't be a problem