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Saudi Arabia's Köppen climate classification map.. The climate of Saudi Arabia is marked by high temperatures during the day and low temperatures at night. The country follows the pattern of the desert climate, with the exception of the southwest, which features a subtropical highland climate and a semi-desert climate.
Countries by average annual precipitation. ... Per the World Bank (2017) [1] [2] Country mm/ year) Continent 1 ... Saudi Arabia: 59:
Saudi Arabia is a semi-arid nation with limited groundwater resources and no natural rivers or lakes. High temperatures and low rainfall of less than 100mm per year cause the few surface water resources that exist to be unable to meet the nation's needs due to the rate of evaporation being higher than the rate of precipitation.
Since Mecca is located in a low-lying region, it is threatened by seasonal flash floods despite the low amount of annual precipitation. There are less than 110 millimetres (4.3 in) of rainfall during the year, mainly falling in the winter months. Temperatures are high throughout the year and in summer it may reach 45 °C (113 °F). [8]
Highest dew point temperature: A dew point of 35 °C (95 °F) — while the temperature was 42 °C (108 °F) — was observed at Dhahran, Saudi Arabia, at 3:00 p.m. on 8 July 2003. [199] Highest heat index: In the observation above at Dhahran, Saudi Arabia, the heat index ("feels like" temperature) was 81.1 °C (178.0 °F). [199]
Average monthly precipitation (in mm) for selected cities in Asia ; City Country Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ref. Mawsynram: India: 133.0 8.3 15.7 27.4 29.8 26.0 5.7
The climate is mainly dry. Most areas get around 100 mm (3.9 in) of rain per year. Unlike the Sahara Desert—more than half of which is hyperarid (having rainfall of less than 50 mm (2.0 in) per year)—the Arabian Desert has only a few hyperarid areas. These rare driest areas may get only 30 to 40 mm (1.6 in) of rain per year.
The region has the highest average rainfall of Saudi Arabia [citation needed] due to largely seasonal rain. Average rainfall can range from 600 millimetres (24 in) to over 1,000 millimetres (39 in) per year, in wet regions.