Jordan's only coastline at its southern extremity, where nearly 26 kilometres (16 mi) of shoreline along the Gulf of Aqaba provides access to the Red Sea.
Except for small sections of the borders with Israel and Syria, Jordan's international boundaries do not follow well-defined natural features of the terrain.
[2] The new boundary enabled Jordan to expand its port facilities and established a zone in which the two parties agreed to share petroleum revenues equally if oil were discovered.
Occasional jumbles of sandstone hills or low mountains support only meager and stunted vegetation that thrives for a short period after the scanty winter rains.
In many areas the relief provides no eventual outlet to the sea, so that sedimentary deposits accumulate in basins where moisture evaporates or is absorbed in the ground.
Toward the depression in the western part of the East Bank, the desert rises gradually into the Jordanian Highlands—a steppe country of high, deeply cut limestone plateaus with an average elevation of about 900 meters.
Bordered by a steep escarpment on both the eastern and the western side, the valley reaches a maximum width of twenty-two kilometers at some points.
The major characteristic of the climate is the contrast between a relatively rainy season from November to April and very dry weather for the rest of the year.
With hot, dry, uniform summers and cool, variable winters during which practically all of the precipitation occurs, the country has a Mediterranean-style climate.
In general, the farther inland from the Mediterranean Sea a given part of the country lies, the greater are the seasonal contrasts in temperature and the less rainfall.
These cyclonic disturbances generally move eastward from over the Mediterranean Sea several times a month and result in sporadic precipitation.
The fairly wide ranges of temperature during a twenty-four-hour period are greatest during the summer months and have a tendency to increase with higher elevation and distance from the Mediterranean seacoast.
Except in the rift depression, frost is fairly common during the winter, it may take the form of snow at the higher elevations of the north western highlands.
Known in the Middle East by various names, including the khamsin, this dry, sirocco-style wind is usually accompanied by great dust clouds.
Remarkably steady during daytime hours but becoming a breeze at night, the shamal may blow for as long as nine days out of ten and then repeat the process.