Number of days available for climatic review
| Parameter | Jan | Feb | Mär | Apr | Mai | Jun |
| Tmax | 165 | 138 | 150 | 147 | 153 | 145 |
| Tmin | 164 | 134 | 150 | 145 | 154 | 149 |
| Sonnenscheindauer | 285 | 215 | 242 | 235 | 241 | 237 |
| Niederschlag | 188 | 172 | 192 | 187 | 188 | 180 |
| Feuchte/Sicht | 181 | 163 | 177 | 177 | 183 | 176 |
| Parameter | Jul | Aug | Sep | Okt | Nov | Dez |
| Tmax | 152 | 127 | 137 | 122 | 116 | 123 |
| Tmin | 153 | 129 | 135 | 116 | 117 | 123 |
| Sonnenscheindauer | 238 | 214 | 221 | 202 | 207 | 247 |
| Niederschlag | 186 | 194 | 212 | 217 | 212 | 221 |
| Feuchte/Sicht | 182 | 182 | 203 | 206 | 199 | 210 |
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. |
