Number of days available for climatic review
| Παράμετρος | Ιαν | Φεβ | Μαρ | Απρ | Ιουν | Ιουλ |
| Tmax | 633 | 563 | 640 | 628 | 648 | 628 |
| Tmin | 636 | 576 | 642 | 628 | 648 | 628 |
| Διάρκεια Ηλιοφάνειας | 98 | 78 | 88 | 92 | 111 | 101 |
| Υετός | 123 | 112 | 123 | 121 | 124 | 121 |
| Υγρασία/Ορατότητα | 108 | 100 | 115 | 117 | 122 | 118 |
| Παράμετρος | Αυγ | Σεπ | Οκτ | Νοε | Δεκ | (null) |
| Tmax | 648 | 658 | 628 | 649 | 630 | 637 |
| Tmin | 646 | 656 | 638 | 655 | 638 | 633 |
| Διάρκεια Ηλιοφάνειας | 95 | 112 | 110 | 104 | 68 | 94 |
| Υετός | 134 | 155 | 144 | 140 | 138 | 128 |
| Υγρασία/Ορατότητα | 122 | 129 | 126 | 124 | 121 | 111 |
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. |
