Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 1333 | 1215 | 1333 | 1290 | 1333 | 1290 |
Tmin | 1333 | 1215 | 1333 | 1290 | 1333 | 1290 |
Duration of sunshine | 1176 | 1069 | 1178 | 1139 | 1177 | 1137 |
Precipitation | 157 | 140 | 158 | 151 | 155 | 150 |
Humidity/Visibility | 154 | 138 | 154 | 149 | 154 | 149 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 1333 | 1333 | 1290 | 1333 | 1290 | 1333 |
Tmin | 1333 | 1333 | 1290 | 1333 | 1290 | 1333 |
Duration of sunshine | 1178 | 1177 | 1139 | 1171 | 1139 | 1208 |
Precipitation | 157 | 159 | 150 | 153 | 150 | 186 |
Humidity/Visibility | 153 | 151 | 148 | 149 | 148 | 184 |
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. |