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-arid climate
| Climate data for Riyadh (1985-2010) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 32 (89) |
35 (95) |
38 (100) |
42 (108) |
45 (113) |
47 (117) |
48 (119) |
50 (122) |
45 (113) |
41 (106) |
38 (100) |
31 (88) |
50 (122) |
| Average high °C (°F) | 20 (68) |
23 (74) |
28 (82) |
33 (92) |
39 (103) |
43 (109) |
43 (110) |
44 (111) |
41 (105) |
36 (96) |
28 (82) |
22 (72) |
33 (92) |
| Daily mean °C (°F) | 14 (58) |
17 (63) |
22 (71) |
27 (80) |
33 (91) |
36 (96) |
37 (98) |
37 (98) |
33 (92) |
28 (83) |
22 (71) |
16 (61) |
27 (80) |
| Average low °C (°F) | 9 (48) |
11 (52) |
15 (59) |
21 (69) |
26 (79) |
28 (82) |
29 (85) |
29 (85) |
26 (79) |
21 (70) |
16 (60) |
11 (51) |
20 (68) |
| Record low °C (°F) | −2 (28) |
1 (33) |
4 (40) |
11 (52) |
18 (64) |
21 (70) |
24 (75) |
23 (73) |
16 (61) |
14 (57) |
7 (45) |
2 (35) |
−2 (28) |
| Average precipitation cm (inches) | 1.3 (0.5) |
0.8 (0.3) |
2.4 (0.9) |
2.8 (1.1) |
0.5 (0.2) |
0.3 (0.1) |
0.4 (0.2) |
0.4 (0.2) |
0 (0) |
0.1 (0.0) |
0.9 (0.4) |
1.5 (0.6) |
11.2 (4.4) |
| Source 1: "Jeddah Regional Climate Centre South West Asia". Archived from the original on 11 December 2016. Retrieved 27 May 2015.[1] | |||||||||||||
| Source 2: Time and Date (dewpoints, 1985-2015)[2] | |||||||||||||
