Number of days available for climatic review
| Παράμετρος | Ιαν | Φεβ | Μαρ | Απρ | Ιουν | Ιουλ |
| Tmax | 151 | 127 | 135 | 121 | 141 | 137 |
| Tmin | 146 | 129 | 135 | 130 | 140 | 133 |
| Διάρκεια Ηλιοφάνειας | 124 | 141 | 155 | 150 | 186 | 150 |
| Υετός | 155 | 141 | 157 | 152 | 155 | 150 |
| Υγρασία/Ορατότητα | 154 | 139 | 153 | 148 | 153 | 148 |
| Παράμετρος | Αυγ | Σεπ | Οκτ | Νοε | Δεκ | (null) |
| Tmax | 140 | 138 | 142 | 171 | 171 | 175 |
| Tmin | 135 | 136 | 140 | 168 | 171 | 177 |
| Διάρκεια Ηλιοφάνειας | 155 | 155 | 120 | 186 | 150 | 155 |
| Υετός | 158 | 162 | 180 | 184 | 180 | 186 |
| Υγρασία/Ορατότητα | 153 | 154 | 176 | 178 | 176 | 185 |
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. |
