Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 0 | 0 | 1024 | 0 | 1074791425 | 1074791425 |
| Tmin | 1195725391 | 1028542281 | 1163001904 | 1397052753 | 1381326676 | 1664040265 |
| Duration of sunshine | 1 | 0 | -2128191976 | 0 | 5608365 | 0 |
| Precipitation | 0 | 0 | 0 | 0 | 0 | 0 |
| Humidity/Visibility | 1296630064 | -1862202647 | -1975295040 | 0 | 0 | 0 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1074791425 | 1074791425 | -2128196112 | 0 | -2128196616 | 0 |
| Tmin | 1630366055 | 1664053360 | 1048576 | 1073741824 | 1073741824 | 1073741824 |
| Duration of sunshine | 255 | 0 | 0 | 240 | 0 | 0 |
| Precipitation | 0 | 0 | 0 | 0 | 0 | 0 |
| Humidity/Visibility | 0 | 0 | -2128196176 | 0 | -1975523044 | 0 |
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. |
