Table 1: Average of climate records for 10 years (2009 - 2018) in Al Rayn area (Source: Saudi General Authority of Meteorology and Environmental Protection).

Climate variable

Range

Mean

Max air temperature (°C)

34.7-35.8

35.2

Min air temperature (°C)

13.7-16.2

15.0

Rainfall (mm/ month)

0.02-42.4

21.3

Relative humidity (%)

45.3-61.1

59.2

Wind speed (km/ h)

4.6-16.8

10.7