Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2152 | 1955 | 2162 | 2095 | 2150 | 2095 |
| Tmin | 2164 | 1957 | 2165 | 2092 | 2153 | 2097 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 184 | 166 | 184 | 176 | 179 | 176 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2164 | 2165 | 2118 | 2183 | 2122 | 2195 |
| Tmin | 2166 | 2160 | 2125 | 2181 | 2128 | 2193 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 190 | 210 | 206 | 210 | 217 |
| Humidity/Visibility | 182 | 182 | 202 | 198 | 203 | 213 |
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. |
