Riyadh
Climate
Table:
Climate data for Riyadh (1985-2010)

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Record high °C (°F)

31.5
(88.7)

34.8
(94.6)

38.0
(100.4)

42.0
(107.6)

45.1
(113.2)

47.2
(117.0)

48.0
(118.4)

47.8
(118.0)

45.0
(113.0)

41.0
(105.8)

38.0
(100.4)

31.0
(87.8)

48.0
(118.4)

Mean daily maximum °C (°F)

20.2
(68.4)

23.4
(74.1)

27.7
(81.9)

33.4
(92.1)

39.4
(102.9)

42.5
(108.5)

43.5
(110.3)

43.6
(110.5)

40.4
(104.7)

35.3
(95.5)

27.8
(82.0)

22.2
(72.0)

33.3
(91.9)

Daily mean °C (°F)

14.4
(57.9)

17.3
(63.1)

21.4
(70.5)

26.9
(80.4)

32.9
(91.2)

35.7
(96.3)

36.8
(98.2)

36.7
(98.1)

33.5
(92.3)

28.4
(83.1)

21.5
(70.7)

16.3
(61.3)

26.8
(80.3)

Mean daily minimum °C (°F)

9.0
(48.2)

11.2
(52.2)

15.2
(59.4)

20.4
(68.7)

25.9
(78.6)

28.0
(82.4)

29.3
(84.7)

29.2
(84.6)

25.9
(78.6)

21.2
(70.2)

15.5
(59.9)

10.6
(51.1)

20.1
(68.2)

Record low °C (°F)

−2.2
(28.0)

0.5
(32.9)

4.5
(40.1)

11.0
(51.8)

18.0
(64.4)

16.0
(60.8)

23.6
(74.5)

22.7
(72.9)

16.1
(61.0)

14.0
(57.2)

7.0
(44.6)

1.4
(34.5)

−2.2
(28.0)

Average rainfall mm (inches)

12.5
(0.49)

8.0
(0.31)

24.0
(0.94)

28.0
(1.10)

4.9
(0.19)

3.0
(0.12)

3.7
(0.15)

4.0
(0.16)

0.1
(0.00)

0.2
(0.01)

0.9
(0.04)

14.6
(0.57)

103.9
(4.08)

Average rainy days

6.1

4.3

9.4

11.3

3.3

0.0

0.1

0.2

0.0

0.5

3.3

6.3

44.8

Average relative humidity (%)

47

36

32

28

17

11

10

12

14

20

36

47

26

Mean monthly sunshine hours

212.4

226.6

219.8

242.3

287.7

328.2

332.1

309.2

271.6

311.4

269.2

214.3

3,224.8

Percentage possible sunshine

63

71

59

63

70

80

80

77

74

87

82

65

72

Source: "Jeddah Regional Climate Centre South West Asia".[27]

Per the details in the tabular data covering 'Riyadh' — "Climate" section, summarise the highlighted cells in a single sentence and format it within the following JSON object {"answer": "YOUR ANSWER"}.