Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1166 | 1054 | 1179 | 1145 | 1179 | 1120 |
| Tmin | 1169 | 1059 | 1160 | 1122 | 1158 | 1138 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 93 | 85 | 117 | 121 | 124 | 92 |
| Humidity/Visibility | 92 | 84 | 102 | 102 | 105 | 90 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1153 | 1145 | 1112 | 1163 | 1145 | 1177 |
| Tmin | 1165 | 1157 | 1110 | 1169 | 1162 | 1191 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 93 | 96 | 90 | 111 | 122 | 124 |
| Humidity/Visibility | 91 | 89 | 87 | 104 | 113 | 123 |
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. |
