Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 786 | 715 | 792 | 793 | 817 | 789 |
| Tmin | 787 | 710 | 785 | 787 | 813 | 788 |
| Duration of sunshine | 302 | 268 | 297 | 203 | 270 | 277 |
| Precipitation | 689 | 620 | 688 | 688 | 715 | 697 |
| Humidity/Visibility | 99 | 97 | 108 | 127 | 132 | 127 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 827 | 816 | 787 | 811 | 786 | 819 |
| Tmin | 822 | 807 | 790 | 797 | 775 | 804 |
| Duration of sunshine | 326 | 287 | 313 | 337 | 307 | 349 |
| Precipitation | 722 | 720 | 705 | 732 | 700 | 167 |
| Humidity/Visibility | 136 | 129 | 125 | 117 | 110 | 125 |
Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured. |
Agadez