Climate - Saudi Arabia

In Saudi Arabia, the climate is generally desert, and it's very hot in summer in all of the country. The rains are very scarce almost everywhere, and concentrated from November to April. There are, however, differences among the areas that are worth considering.

Index

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• The coasts - West Coast, Al Wajh, Jeddah, Mecca, Jizan, East Coast, Dammam
• The syrian Desert - Turaif
• The plateau - Ha'il, Riyadh, Medina, Rub' al Khali
• The mountains - Abha

The coasts

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Along both the western and eastern coasts of Saudi Arabia, the climate is desert, and it's particularly mild in winter, even warm in the central and southern part of the Red Sea coast, while in summer, it's very hot everywhere, but it's sultry on the shores of the Red Sea, and a bit drier, and therefore torrid, on the shores of the Persian Gulf.

Red Sea Coast

On the coast of the Red Sea (called Tihamah), the average temperature in January is around 14 °C (57 °F) in the northernmost part, ie on the Gulf of Aqaba, where it can sometimes get cold at night, while it reaches 25 °C (77 °F) of the southern part, where therefore there's no real winter, and it's hot all year round. Summer is very hot everywhere.

Al Wajh

In Al Wajh, in the northern part of the coast, winter is pleasantly warm, while summer is very hot. Here are the average temperatures.

In Al Wajh, the sun shines all year round, as we can see in the following table.

The Red Sea in Al Wajh is warm enough for swimming all year round, although it goes down to 23.5 °C (74 °F) in February and March, while it gets very warm in summer. In the northernmost part, in the Gulf of Aqaba, it is a bit cool in winter, since it goes down to 21 °C (70 °F) in February and March.

Jeddah

Already in Jeddah, in the central part of the west coast, the average in January is 23.5 °C (74.5 °F). Summer is very hot and humid, with highs around 38/39 °C (100/102 °F) between June and August; the heat is sweltering because of the humidity coming from the sea. By contrast, in the days when the wind blows from the interior, the temperature can reach as high as 47/49 °C (117/120 °F) from May to September. Rainfall is definitely scarce: the rainiest month is November, with only 20 millimeters (0.8 inches) of rain. Here are the average temperatures.

Jeddah is a very sunny city, but in summer, it can be reached by some cloud banks. However, this phenomenon is more evident in the southern part of the Red Sea coast, which from June to September is affected by cloud banks coming from Africa due to the southwest monsoon (see below), which on the mountains can also bring some rains.

At the latitude of Jeddah, the Red Sea in winter is a bit warmer than in the northern part of the coast.

Mecca

Mecca is not right on the coast, but it lies at sea level and to the west of the mountains, so it's hot throughout the year as well, actually, it's even hotter than Jeddah, especially in summer, when highs are normally around 43/44 °C (109/111 °F).
The humidity is lower than on the coast, but the combination of humidity and temperature makes the heat oppressive. Mecca is a very hot city, in fact, during the day the temperature normally exceeds 40 °C (104 °F) for several months, from May to September; there are about 300 days with more than 32 °C (90 °F) per year, and the daily average temperature of the whole year is as high as 31.8 °C (89.2 °F). The highest record is 51.4 °C (124.5 °F), set in June 2012. Mecca is therefore one of the hottest large cities in the world. Here are the average temperatures.

In Mecca, only 110 mm (4.3 in) of rain fall per year. Here is the average precipitation.

In Mecca too, the sun shines very often; in summer, however, there can be some cloud banks coming from Africa, though there are still as many as 3,400 hours of sunshine per year.

Jizan

In Jizan (or Gizan), in the southernmost part of the coast, winter is even warmer, while summer is a bit less hot because of the south-west winds that in this season blow in a more evident way. Average highs in the summer months are around 38 °C (100 °F); on the other hand, high humidity makes the heat sweltering. Here are the average temperatures.

Because of the southwest monsoon, in summer, it is possible to see some rain, especially in August. Here is the average rainfall.

The sun in Jizan shines all year round, though there is a certain decrease in the sunshine hours in summer because of the southwest monsoon.

In Jizan, and on the Farasan Islands, which lie off the coast, the sea is warm all year round, and exceeds 30 °C (86 °F) from May to October.

Persian Gulf Coast

In the east, on the coast of the Persian Gulf, the climate is sunny and desert. Winter is mild, but it's cooler than on the Red Sea coast: the average in January is between 12 and 17 °C (54 and 63 °F); sometimes at night it can get cold, especially in the northern part, near the border with Kuwait, where lows can drop to around freezing (0 °C or 32 °F).
Summer is very hot and sunny. However, since the prevailing wind blows from the northwest, originally from the Iraqi desert, and therefore it does not come directly from the sea, the summer is a bit less humid than on the coast of the Red Sea.

Dammam

In Dammam, and in the nearby cities of Dhahran and Khobar, located in the central part of the coast, the average temperature ranges from 16 °C (61 °F) in January to 37 °C (98.5 °F) in July. Throughout the year, only 90 mm (3.5 in) of rain fall, concentrated from November to April. During winter, there can be very cool days, or even a bit cold at night. Summer is scorchingly hot, and the record is 51 °C (124 °F). Here are the average temperatures.

The sun in Dammam shines all year round, however, some cloud banks can sometimes reach the area, even in summer.

The Persian Gulf, in the central part where Dammam is located, is a bit cool from January to March, while it becomes very warm from May to November. In summer, the Persian Gulf becomes the warmest sea in the world, even more so than the Red Sea.

In the northernmost part, near the border with Kuwait, the sea in winter is a bit colder, in fact, the temperature drops to 18 °C (64 °F) in February and March. In contrast, in the southernmost part, in the small coastal stretch between Qatar and the Emirates, the sea in winter is a bit warmer, so much so that the water temperature does not go below 23 °C (73 °F).

The syrian Desert

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In the far north, there is an offshoot of the Syrian desert, which has a desert continental climate, with relatively cold winters, also due to the higher altitude, and hot summers.

Turaif

In Turaif, at 850 meters (2,800 ft) above sea level, the monthly average temperature ranges from 7.5 °C (45.5 °F) in January to 29.5 °C (85 °F) in August, with highs around 38 °C (100 °F). During winter, cold waves can occur: in these cases, the temperature can drop to -6/-8 °C (17/21 °F), and more rarely (given the low precipitation amount) it can even snow. On the contrary, despite the altitude, the temperature in summer can reach 43/45 °C (109/113 °F). Here are the average temperatures.

Precipitation occurs from November to April and is scarce, around 80 mm (3.1 in), while from June to September, basically, it never rains.

The sun in Turaif shines all year round, but especially in summer, when the sky is almost always unclouded.

The plateau

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Most of the Arabian Peninsula is occupied by a plateau, called Najd, whose altitude goes between 400 and 1,200 meters (1,300 and 4,000 feet). In addition to the rocky deserts, there is a series of sandy deserts connected to one another, called An Nafud, ad-Dahna, and Rub 'al Khali; the latter is the southernmost and largest, a huge expanse of sand. The plateau, desert and sunny like almost all of Saudi Arabia, has a fairly uniform climate: mild in winter, but with very cool or cold nights, and very hot in summer, but with low humidity. The main differences occur in winter, when the northern part is much colder than the southern one.

Ha'il

In Ha'il, located in the northern part of the plateau at 1,000 meters (3,300 feet) above sea level, the monthly average temperature ranges from 11 °C (52 °F) in January to 32,5 °C (90.5 °F) in August. In winter, days are usually mild, while nights are often cold, and sometimes the temperature can go below freezing. In January 2008, the temperature dropped to -10 °C (14 °F). In summer, the temperature can reach 44/46 °C (111/115 °F) from June to September.
Here are the average temperatures.

Precipitation amounts to 150 mm (6 in) per year, with a maximum of 40 mm (1.6 in) in November, and no rains from June to September.

Riyadh

Riyadh, the capital, is located in the center of the country, at 600 meters (2,000 feet) above sea level. Winter, from December to February, is mild, the average in January being 14 °C (57 °F). Sometimes at night, the temperature can approach freezing. At the airport, the temperature dropped to -4.5 °C (24 °F) in January 1992 and to -5 °C (23 °F) in January 2008. However, there are also warm days, with temperature close to 30 °C (86 °F) even in winter. In summer, from June to September, it never rains, and the temperatures are very high, around 44 °C (111 °F) in July and August, but with peaks around 47 °C (117 °F). However, relative humidity is very low.

Throughout the year, only 100 mm (4 in) of rain fall, almost all occurring from November to April, with a maximum of 20/25 mm (0.9/1.0 in) per month in March and April.

The sun in Riyadh shines all year round, however, here too, some cloud banks can sometimes reach the area, even in summer.

Medina

Medina is located in the west, at 600 meters (2,000 feet) above sea level like Riyadh, but it's milder than the capital in winter, since the January average is 18 °C (64 °F), with highs around 24.5 °C (76 °F). Sometimes it can get cold at night, but more rarely than in Riyadh; the temperature dropped to 1 ° C in January 2008. Actually, the temperature often reaches 28/30 °C (82/86 °F) even in winter. Summer is similar to that of Riyadh, that is, scorchingly hot and sunny. Here are the average temperatures.

In Medina too, rainfall is scarce, since it amounts to just 60 mm (2.4 in) per year, most of which falls from November to May. However, every now and then, a thunderstorm can break out in the summer, or rather, there may be thunder and lightning, especially in August, though usually without rain.

Rub' al Khali

In the south, the desert of Rub 'al Khali, uninhabited and mysterious, is quite warm even in winter, with highs in January around 25/26 °C (77/79 °F). At night, it can get pretty cool, but temperatures do not drop below freezing. In summer, the southernmost part of this desert is brushed by the south-west monsoon; in fact, some cloud banks may pass over the area, and sometimes, even a rain shower may occur.
Very rarely, the Rub 'al Khali desert may be affected by the remains of tropical cyclones coming from the Arabian Sea, which can bring sand storms, and unusual rains in the middle of the desert, as happened in May 2018 with Cyclone Mekunu. Cyclones form from May to December, and are more frequent at the beginning of the period (May-June) and a little less at the end (October-December).

In Saudi Arabia, there are practically no rivers of any importance, but as happens in desert countries, there are many dry riverbeds, called wadis, which can sometimes turn into ephemeral streams after the rains, which are usually short but violent.

The mountains

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The western part of Saudi Arabia, known as Hejaz, is crossed by a mountain range parallel to the coast of the Red Sea. In the north (the area circled in green on the map), the climate is desert, with no summer rainfall, though some rains are possible in winter, and even snowfalls at the highest altitudes, as happens in Jebel al Lawz, 2,580 meters (8,465 feet) high, located in the north-west.

In the southern part of the mountains, in the Asir, Jizan and Al-Bahah regions (burgundy area), there are several peaks above 2,000 meters (6,500 feet), among which is the highest mountain of Saudi Arabia, Jabal Sawda, 2,990 meters (9,810 feet) high. In this area, the climate is obviously tempered by altitude, in addition, in summer, especially in the southern part, it is affected by the southwest monsoon, a wet current affecting southern Arabia, which brings a bit of rain from June to September, as well as widespread cloudiness. Some rain may fall also in spring, between March and May. In some areas, precipitation exceeds 250 mm (10 in) per year, so the climate is semi-arid rather than desert. On the southwest-facing slopes, there are verdant landscapes and terraces, where water springs are used for irrigation.

Abha

In Abha, located in the Asir National Park, at 2,000 meters (6,500 feet) above sea level, the average temperature ranges from 14 °C (57 °F) in January to 24.5 °C (76 °F) in July. Here are the average temperatures.

The rainiest season in Abha is spring, but some rains occur even in summer. Here is the average precipitation.

The sun in Abha often shines all year round, but the least sunny months are July and August.




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