Number of days available for climatic review
| Parametro | Gen | Feb | Mar | Apr | Mag | Giu |
| Tmax | 184 | 165 | 181 | 175 | 184 | 179 |
| Tmin | 185 | 167 | 184 | 179 | 186 | 176 |
| Durata del soleggiamento | 184 | 158 | 176 | 179 | 184 | 175 |
| Precipitazione | 186 | 169 | 189 | 181 | 186 | 180 |
| Umidità/Visibilità | 184 | 168 | 184 | 178 | 184 | 178 |
| Parametro | Lug | Ago | Set | Ott | Nov | Dic |
| Tmax | 183 | 185 | 205 | 209 | 207 | 218 |
| Tmin | 185 | 187 | 207 | 211 | 207 | 217 |
| Durata del soleggiamento | 183 | 185 | 207 | 207 | 202 | 213 |
| Precipitazione | 186 | 190 | 212 | 215 | 210 | 217 |
| Umidità/Visibilità | 184 | 186 | 206 | 210 | 207 | 216 |
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. |
