Number of days available for climatic review
| Παράμετρος | Ιαν | Φεβ | Μαρ | Απρ | Ιουν | Ιουλ |
| Tmax | 291 | 254 | 301 | 289 | 305 | 292 |
| Tmin | 284 | 258 | 282 | 279 | 295 | 290 |
| Διάρκεια Ηλιοφάνειας | 166 | 117 | 202 | 154 | 157 | 219 |
| Υετός | 152 | 140 | 155 | 150 | 157 | 152 |
| Υγρασία/Ορατότητα | 105 | 96 | 108 | 107 | 113 | 110 |
| Παράμετρος | Αυγ | Σεπ | Οκτ | Νοε | Δεκ | (null) |
| Tmax | 303 | 318 | 314 | 317 | 309 | 297 |
| Tmin | 297 | 319 | 313 | 310 | 270 | 289 |
| Διάρκεια Ηλιοφάνειας | 211 | 230 | 195 | 150 | 163 | 215 |
| Υετός | 160 | 186 | 184 | 182 | 180 | 163 |
| Υγρασία/Ορατότητα | 113 | 126 | 126 | 123 | 115 | 109 |
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. |
