Table 2: Average measurements around Makkah for one year (2016-2017).

Measurements Round-1
9 Weeks (Spring)
Round-2
10 Weeks (Summer)
Round-3
8 Weeks (Autumn)
Round-4
10 Weeks (Winter)
Temperature °C 30.4 ± 1.56 39.5 ± 3.25 35.6 ± 1.88 29.1 ± 1.47
Wind Speed (ms-1) 6.5 ± 3.2 5.0 ± 1.3 6.6 ± 1.8 4.3 ± 1.7
PM10 (µgm-3) 120.1 ± 52.2 223.4 ± 30.4 77.6 ± 36.72 89 ± 62.7
Cd (µgm-3) 0.067 0.098 0.060 0.08
Cr (µgm-3) 0.003 0.008 0.007 0.009
As (µgm-3) 0.20 0.26 0.13 0.16
Be (µgm-3) 0.01 0.03 0.03 0.002
Ni (µgm-3) 0.001 0.012 0.01 0.01