These days, air-conditioning is abundant in homes and transportation, so it's not that much of an issue.
Traditionally, though, there are two parts to the answer:
1) Within a town or city, it was more about building for the heat. Homes were closely packed so that allies and streets were all in the shade. The materials used in building were indigenous to the region (clay, rocks, limestone, coral rock, etc) were typically insulating and felt cool to the touch in the heat, warm in the cold.
2) Moving outside the city for trade or hunting (mainly male activities) was were clothing really played a role, and here's a breakdown (most still worn today) :
- The "thoub" is like a loose-fitting robe, light and breezy to help keep the person cool. It's typically white or beige cotton (cotton/polyester these days) in the hot seasons (the color it reflective of sunlight), and dark brown, navy or black wool in the winter (absorbs sunlight). Note that the white color is also culturally/religiously relevant.
- The "ghutrah" is the light cloth worn on the head, typically white (see above), but a "shmagh" could have a different colored pattern, typically red. This covers the head and back of the neck, and the loose part can also be used to protect the face from dust or sand storms (material is thin and breathable).
- The "'igal" is a relatively "heavy" weaved ring that is placed on the head to hold down the "ghutrah" and prevent it from being carried away by the wind. Traditionally it wasn't colored, so it was typically white or off-white, then came the golden variety as a status symbol, and these days it's typically black, probably as a contrast to all the white.
Of course, cultural and environmental factors always meld in these cases, so there're some cultural aspects as well.
Women's outdoors clothing was designed for inner city movement (to the market/mosque or to visit a neighbor) and were typically removed once the person was indoors in a place without non-"mahram"s (religious reasons regarding hijab), so the main concern was avoiding short periods of exposure to the sun's rays rather than the heat factor. The clothes were loose fitting and light (both for cooling and religious reasons), and originally of light natural colors but more recently black (more of a local cultural move, as other Islamic cultures do not stick to black). As such, when women moved between cities, they generally did so in a "hawdaj" (a covered mode of transport, most basically just a support frame and cover cloth placed on the horse or camel), while men rode without cover (there clothes were better suited for direct sunlight and they also had the jobs or leading the covered animals and of being lookouts for any trouble, such as storms or marauders).
They wear these dress types of things~!!
because in saudi arabia it is very hot in day time and cool in night time that's why the men coverd the head and neck by white cloth because the white refelect the heat and it protect the body in that way it influenced
Few people live in this desert because it is extremely hard to find food and water to survive. The raving heat can cause many health issues such as heat rash, heat exastion and heatstroke- all leathal
Saudi Arabia is a large country with diverse topography, which means that the weather is not the same everywhere. In most of Saudi Arabia the days are extremely hot during the summer with temperatures rising up to 50 C. During this time sandstorms are prevalent and can at times reduce visibility considerably. in the coastal cities the humidity is very high towards the end of summer. The autumn and spring months, that is October - November and March - April are particularly pleasant with warm mild days and comfortable evenings. In both the north and south of Saudi Arabia where the areas are mountainous and green, it is much cooler and snowfalls are common in winter in the northern cities. Saudis often like to escape the summer heat and take refuge in the cities which are located in the mountains.
Mostly for cultural reasons. In some regions, such as Saudi Arabia, the climate is very hot and they wear it to be cooler and more comfortable. The color of the "dishdashy" is usually white because white reflects heat from the sun. Some believe that prophets back in the beginning of Islam wore the same type of clothes and so they choose to wear the same.
It protects us from wind, water and heat and people.
Greenland has a polar climate characterized by cold temperatures, ice cover, and significant snowfall, with long winters and short, cool summers. In contrast, Saudi Arabia has a desert climate, marked by extreme heat, low humidity, and minimal rainfall, with very hot summers and mild winters. These distinct climates result in vastly different ecosystems, vegetation, and living conditions in the two regions.
The hottest country in the world is typically considered to be Kuwait based on its high average temperatures throughout the year. Saudi Arabia and Iraq also experience extreme heat.
With the exception of the province of Asir with its towns of Jizan on the western coast and Najran, Saudi Arabia has a desert climate characterized by extreme heat during the day, an abrupt drop in temperature at night, and slight, erratic rainfall. Because of the influence of a subtropical high-pressure system and the many fluctuations in elevation, there is considerable variation in temperature and humidity. The two main extremes in climate are felt between the coastal lands and the interior.it is hot
Mecca, Saudi Arabia has a hot desert climate, with very high temperatures throughout the year and minimal rainfall. It is important to be prepared for extreme heat and sun exposure during your time of travel to the Kaaba.
It can go upto 55 Degree celsius in the Summer(April - August) Cold up to 10 degree celsius in the Winter(November --- February)
Dress appropriately and ensure you have shelter, heat, food and water.