Ouallene has a hot desert climate (Köppen climate classification BWh), with a really long, torrid summer and a brief, very warm winter, and averages just 17 millimetres (0.67 in) of rainfall per year. The excessively sunny, hot, dry climate is marked by very high temperatures and near-zero precipitation all year-long. During many months of the year, highs of 40° are common and from June to August, inclusively, highs are consistently hovering around 45° with lows rarely dropping below 30°. The annual mean temperature exceeds 28° in Ouallene.
| Climate data for Ouallene (2010 - 2013) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Mean daily maximum °C (°F) |
24.5
(76.1) |
28.3
(82.9) |
33.1
(91.6) |
36.5
(97.7) |
41.0
(105.8) |
45.2
(113.4) |
45.2
(113.4) |
43.9
(111.0) |
42.7
(108.9) |
36.9
(98.4) |
31.6
(88.9) |
27.1
(80.8) |
36.3
(97.4) |
| Daily mean °C (°F) |
16.0
(60.8) |
19.9
(67.8) |
24.5
(76.1) |
27.9
(82.2) |
32.5
(90.5) |
36.4
(97.5) |
37.6
(99.7) |
36.7
(98.1) |
34.9
(94.8) |
29.7
(85.5) |
23.1
(73.6) |
18.6
(65.5) |
28.2
(82.7) |
| Mean daily minimum °C (°F) |
7.7
(45.9) |
11.2
(52.2) |
15.9
(60.6) |
19.3
(66.7) |
24.0
(75.2) |
27.9
(82.2) |
30.1
(86.2) |
29.6
(85.3) |
27.0
(80.6) |
22.4
(72.3) |
14.6
(58.3) |
9.8
(49.6) |
20.0
(67.9) |
| Average precipitation mm (inches) |
3.0
(0.12) |
1.0
(0.04) |
0.0
(0.0) |
0.0
(0.0) |
0.3
(0.01) |
0.3
(0.01) |
2.0
(0.08) |
9.5
(0.37) |
1.0
(0.04) |
0.3
(0.01) |
0.0
(0.0) |
0.0
(0.0) |
17.4
(0.68) |
| Source: Global climatology for Ouallene, Algeria (2010 - 2013)[1] |
