The harsh summer desert temperatures mean that many residents prefer to live in caves bored into the hillsides ("dugouts"). A standard three-bedroom cave home with lounge, kitchen, and bathroom can be excavated out of the rock in the hillside for a similar price to building a house on the surface. However, dugouts remain at a constant temperature, while surface buildings need air conditioning, especially during the summer months, when temperatures often exceed . The relative humidity rarely gets over 20% on these hot days, and the skies are usually cloud-free. The average maximum temperature is , but it can get quite cool in the winter.