| Average climate data for Arlal, Mali | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 30 | 33 | 37 | 41 | 42 | 43 | 40 | 38 | 39 | 39 | 35 | 31 | 43 |
| Average minimum temperature (°C) | 15 | 18 | 21 | 25 | 29 | 32 | 31 | 30 | 30 | 28 | 23 | 17 | 15 |
| Average precipitation (mm) | 0 | 0 | 0 | 1 | 4 | 5 | 14 | 45 | 13 | 2 | 1 | 0 | 85 |
| Average rainfall days (days) | 0 | 0 | 1 | 1 | 2 | 4 | 8 | 10 | 5 | 2 | 0 | 0 | 34 |
| Average relative humidity (%) | 15 | 13 | 12 | 11 | 14 | 21 | 30 | 38 | 29 | 17 | 15 | 15 | 19 |
| Average wind speed (km/h) | 16 | 17 | 16 | 15 | 14 | 15 | 17 | 16 | 13 | 14 | 15 | 17 | 15 |
| Average daily daylight hours (h) | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 12 |
| Average daily sunshine hours (h) | 8 | 9 | 9 | 11 | 12 | 12 | 11 | 11 | 10 | 7 | 7 | 7 | 10 |
| Average cloud coverage (%) | 13 | 11 | 8 | 7 | 7 | 11 | 16 | 19 | 13 | 8 | 8 | 8 | 11 |
| Average UV index | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 8 | 9 | 8 | 7 | 6 | 8 |
The warmest month, with the highest average maximum temperature, is June (42.6 °C). The month with the lowest average maximum temperature is January (29.7 °C). Overall, the average maximum temperature over the whole year is 37.4 °C.
The month with the highest average minimum temperature is June (32.3 °C). The coldest month, with the lowest average minimum temperature, is January (15.5 °C). Overall, the average minimum temperature over the whole year is 25.2 °C.
The wettest month, with the highest amount of precipitation, is August (45.4 mm). The driest months, with the least amount of precipitation, are January, February, March and December (0 mm). Over the whole year there are 85.5 mm of rainfall on average.
The month with the most days of rain is August (9.9 days). The month with the fewest days of rain is December (0 days). Over the whole year there are 34.1 days of rain on average.
The month with the highest average relative humidity is August (38 %). The month with the lowest average relative humidity is April (11 %). The overall average relative humidity over the whole year is 19.2 %.
The windiest month, with the highest average wind speed, is December (17.1 km/h). The calmest month, with the lowest average wind speed, is September (13.3 km/h). The overall average wind speed over the whole year is 15.4 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is August (19.3 %). The month with the clearest skies, so the lowest cloud coverage, is May (7.1 %). Over the whole year there is an average cloud coverage of 10.7 %.
The month with the longest days, so the most daylight, is June (Average daylight: 13 h). The month with the shortest days, so the least daylight, is December (Average daylight: 11 h). Over the whole year there are 11.8 h of daylight per day on average.
The month with the most sunshine per day is June (Average sunshine: 12.1 h). The month with the least sunshine per day is December (Average sunshine: 7 h). Over the whole year there are 9.6 h of sunlight per day on average.
The months with the highest average UV index are April, May, June, July and September (UV index: 9). The months with the lowest average UV index are January and December (UV index: 6). Over the whole year the average UV index is 7.9.
