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 | 555443824 | 8 |
| Duration of sunshine | -1734303736 | 13225 | 73728 | 0 | -402330794 | 1976726802 |
| Precipitation | -1734309880 | 13225 | -1734308856 | 13225 | -1734307832 | 13225 |
| Humidity/Visibility | -1734332408 | 13225 | -1734331384 | 13225 | -1734330360 | 13225 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | -1729854400 | 13225 | 0 | 0 | 0 | 0 |
| Tmin | 760092462 | 8 | -1732234696 | 13225 | -1738823136 | 9980 |
| Duration of sunshine | 255 | 0 | 760949328 | 8 | 254 | 0 |
| Precipitation | -1734306808 | 13225 | 555443728 | 8 | 760653279 | 8 |
| Humidity/Visibility | -1734329336 | 13225 | -1734311928 | 13225 | -1734310904 | 13225 |
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. |
