Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 147 | 0 | 2466787 | 0 | 200 | 0 |
| Tmin | 549004416 | 8 | 5419552 | 0 | 549004624 | 8 |
| Duration of sunshine | 549004544 | 8 | 695941310 | 8 | -84074994 | 1001265769 |
| Precipitation | 556881928 | 8 | 556882952 | 8 | 556883976 | 8 |
| Humidity/Visibility | 147 | 0 | 556864520 | 8 | 556865544 | 8 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 891498432 | 8 | 0 | 0 | 2412846 | 0 |
| Tmin | 695392558 | 8 | 0 | 0 | 549010265 | 8 |
| Duration of sunshine | 255 | 0 | 24 | 48 | 549005008 | 8 |
| Precipitation | 556885000 | 8 | 556886024 | 8 | 556887048 | 8 |
| Humidity/Visibility | 556866568 | 8 | 556879880 | 8 | 556880904 | 8 |
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. |
