Number of days available for climatic review
| Παράμετρος | Ιαν | Φεβ | Μαρ | Απρ | Ιουν | Ιουλ |
| Tmax | 181 | 166 | 184 | 172 | 182 | 168 |
| Tmin | 177 | 165 | 180 | 176 | 179 | 170 |
| Διάρκεια Ηλιοφάνειας | 279 | 198 | 279 | 240 | 248 | 210 |
| Υετός | 188 | 169 | 187 | 181 | 190 | 186 |
| Υγρασία/Ορατότητα | 182 | 165 | 183 | 177 | 180 | 170 |
| Παράμετρος | Αυγ | Σεπ | Οκτ | Νοε | Δεκ | (null) |
| Tmax | 179 | 182 | 204 | 206 | 204 | 207 |
| Tmin | 184 | 183 | 205 | 211 | 200 | 211 |
| Διάρκεια Ηλιοφάνειας | 279 | 217 | 240 | 279 | 270 | 248 |
| Υετός | 186 | 192 | 210 | 217 | 214 | 219 |
| Υγρασία/Ορατότητα | 183 | 183 | 205 | 208 | 201 | 211 |
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. |
