Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 6624 | 0 | 2461447 | 0 | 200 | 0 |
| Tmin | 2423860 | 0 | 5440832 | 0 | 546876528 | 8 |
| Duration of sunshine | 377528328 | 12563 | 73728 | 0 | -340104345 | 8942983 |
| Precipitation | 377522184 | 12563 | 377523208 | 12563 | 377524232 | 12563 |
| Humidity/Visibility | 377499656 | 12563 | 377500680 | 12563 | 377501704 | 12563 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 381979008 | 12563 | 0 | 0 | 0 | 0 |
| Tmin | 742889262 | 8 | 379597368 | 12563 | 1312700960 | 3349 |
| Duration of sunshine | 255 | 0 | 743746128 | 8 | 254 | 0 |
| Precipitation | 377525256 | 12563 | 546876432 | 8 | 743450079 | 8 |
| Humidity/Visibility | 377502728 | 12563 | 377520136 | 12563 | 377521160 | 12563 |
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. |
