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Climate in Hejaz
(Saudi Arabia)

Average daytime and nighttime temperatures


All climate diagrams on this site result from the collected data from eleven measuring weather stations in Hejaz.
Weather stations at an altitude above 1000m have not been included.
All data correspond to the average monthly values of the last 20 years.


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Overview: Climate in Saudi Arabia
Daylengths and sun positions in Saudi Arabia
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Sunshine hours per day
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 11 hours per day, June is the sunniest month in historical region Hejaz. In December, the sun shines the least.
Rain days per month
A rain day is a day on which at least 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 2 rain days, November offers the most rain days, while June has the fewest.
Precipitation amount in mm/day
The amount of precipitation is measured in millimeters per square meter. Thus, at two mm/day, two liters of water fall on one square meter within 24 hours. With only 0.0 mm, the least amount of rain falls in July. November, on the other hand, has the most rain.
Relative humidity in %
Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture can be physically contained in the air. At high humidity, a person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% feels pleasant. With only 28% humidity on average, it is quite dry in June. The highest value of 51% is experienced here in January.
Absolute humidity in g/m³
In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy. This limit is only reached in a few months in Hejaz, although these are always average values.
Humidex
The "Humidex" (humidity index) is an index of well-being in warmer areas, calculated from the air temperature, relative humidity and dew point. The index corresponds approximately to the temperature felt. At high temperatures, the body transports heat away by sweating. At high humidity, the ambient air can only absorb a small amount of sweat and thus one feels uncomfortable. An index of 20-29 is considered comfortable. Up to 39, people perceive the air as slightly uncomfortable, and above 40, as very uncomfortable. Values above 45 are dangerous in the long run and often lead to heat stroke.
Climate charts for other historical regions in Saudi Arabia

Map of Hejaz

Most important cities in the historical region »Hejaz«

Alone 5 major cities with over 500,000 inhabitants are located here. The historical region has a west-east extension of about 620 km and over 930 km from north to south.

It consists of the four provinces Al Madinah al Munawwarah, Makkah, Mintaqat Tabuk and Mintaqat al Bahah.


CityPopulationGeo position
Jeddah3,976,00021° 32' 33"N39° 11' 53"E
Mecca2,042,00021° 25' 36"N39° 49' 32"E
Medina1,183,20524° 28' 7"N39° 36' 51"E
Ta’if579,97021° 16' 13"N40° 24' 57"E
Tabuk512,62928° 23' 59"N36° 34' 17"E
Yanbu al Bahr233,23624° 5' 21"N38° 3' 49"E
Al Bahah88,41920° 0' 46"N41° 28' 4"E
Ash Shafa72,19021° 4' 20"N40° 18' 43"E
Rabigh41,75922° 47' 55"N39° 2' 6"E
Umm Lajj33,87425° 1' 17"N37° 16' 7"E
Al ‘Ulá32,41326° 36' 31"N37° 55' 23"E
Badr Hunayn27,25723° 46' 59"N38° 47' 26"E
Al Wajh26,63626° 14' 44"N36° 27' 9"E
Turabah23,23521° 12' 51"N41° 37' 59"E
Al Jumum22,20721° 37' 1"N39° 41' 53"E
Duba22,00027° 21' 5"N35° 41' 25"E
Al Mindak9,21820° 9' 32"N41° 17' 0"E
Al Muwayh7,36422° 25' 60"N41° 45' 30"E
Al Hada6,88521° 22' 3"N40° 17' 13"E


Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants: geonames.org, United Nations Statistics Division and own research.
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