Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 737 | 663 | 737 | 714 | 738 | 720 |
| Tmin | 744 | 659 | 734 | 708 | 741 | 717 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 184 | 198 | 197 | 189 | 184 |
| Humidity/Visibility | 180 | 157 | 176 | 171 | 178 | 176 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 740 | 737 | 747 | 768 | 743 | 769 |
| Tmin | 736 | 731 | 748 | 762 | 746 | 769 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 190 | 195 | 212 | 221 | 218 | 226 |
| Humidity/Visibility | 180 | 174 | 205 | 205 | 203 | 207 |
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. |
Aasiaat