Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1254 | 1170 | 1245 | 1177 | 1201 | 1132 |
| Tmin | 1267 | 1169 | 1257 | 1186 | 1202 | 1157 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 879 | 794 | 883 | 859 | 887 | 855 |
| Humidity/Visibility | 170 | 158 | 166 | 163 | 170 | 153 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1180 | 1175 | 1149 | 1185 | 1132 | 1194 |
| Tmin | 1199 | 1199 | 1176 | 1194 | 1136 | 1194 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 880 | 877 | 886 | 906 | 892 | 233 |
| Humidity/Visibility | 165 | 161 | 183 | 189 | 184 | 193 |
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. |
Dagoretti