At night. Because, the very dry air of the desert holds very little moisture, thus holds very little heat, so as soon as the sun sets, the desert cools down considerably.
No, the largest desert in the world is Antarctica, which is obviously very cold. Many deserts sit on high plains and get very cold and snow in the winter months.
Yes, some deserts are cold. The Antarctic is bitterly cold the year round. The Patagonian Desert is quite cool all year while others, such as the Gobi or Great Basin will be very hot in the summer but very cold in the winter. A third group of cold deserts are the cool coastal deserts, such as the Atacama and the Namib, where cold coastal currents tend to moderate the climate and keep it cool
No, there are cold deserts, such as Antarctica, which is bitter cold, and the Atacama Desert which is a cool desert and not hot. Even hot deserts have seasons when they are much cooler.
Deserts are not always hot. Some deserts are cool, some get quite cold in the winter and others are cold all year long.
Some deserts are hot, others cool and yet others cold. The only factor that all deserts have in common is that they are all very dry.
There are hot deserts, there are cold deserts and there are cool coastal deserts. The temperature is also very much influenced by the time of the year. There is no single answer to your question unless you give a specific desert and season of the year.
Not all deserts are hot. There are also polar deserts, cold winter deserts as well as cool coastal deserts.
Hot subtropical desertsCold winter deserts Cold polar deserts Cool coastal deserts
About 2/3s the deserts are hot. Others are classified as cold deserts, cool coastal deserts or cold winter deserts.
Hot subtropical desertsCold winter deserts Cold polar deserts Cool coastal deserts
Some deserts are naturally cool or even bitterly cold. The Patagonian Desert, Atacama Desert and Antarctica are examples of cold deserts. Other deserts are hot during the day but can become quite cool at night.
Generally, deserts have low humidity and little cloud cover. These two factors act as a blanket holding in daytime heating. Without that 'blanket' the heat radiates back into space at night. Deserts, therefore, cool off quite quickly and noticibly once the sun goes down.