Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 175 | 157 | 173 | 171 | 180 | 170 |
Tmin | 177 | 157 | 177 | 158 | 164 | 164 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 202 | 184 | 203 | 197 | 203 | 194 |
Humidity/Visibility | 161 | 144 | 161 | 156 | 162 | 157 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 176 | 183 | 185 | 173 | 168 | 173 |
Tmin | 170 | 176 | 180 | 167 | 168 | 174 |
Duration of sunshine | 0 | 2 | 7 | 0 | 0 | 0 |
Precipitation | 202 | 202 | 225 | 234 | 229 | 245 |
Humidity/Visibility | 161 | 161 | 173 | 174 | 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. |