Number of days available for climatic review
| Παράμετρος | Ιαν | Φεβ | Μαρ | Απρ | Ιουν | Ιουλ |
| Tmax | 183 | 163 | 184 | 178 | 178 | 179 |
| Tmin | 183 | 166 | 185 | 178 | 181 | 174 |
| Διάρκεια Ηλιοφάνειας | 124 | 141 | 124 | 150 | 186 | 150 |
| Υετός | 158 | 145 | 164 | 156 | 169 | 174 |
| Υγρασία/Ορατότητα | 184 | 166 | 184 | 177 | 183 | 175 |
| Παράμετρος | Αυγ | Σεπ | Οκτ | Νοε | Δεκ | (null) |
| Tmax | 177 | 183 | 202 | 209 | 207 | 213 |
| Tmin | 181 | 181 | 206 | 207 | 206 | 215 |
| Διάρκεια Ηλιοφάνειας | 124 | 95 | 160 | 186 | 150 | 93 |
| Υετός | 184 | 190 | 209 | 212 | 211 | 197 |
| Υγρασία/Ορατότητα | 182 | 183 | 207 | 205 | 207 | 212 |
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. |
