Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 183 | 167 | 183 | 178 | 180 | 177 |
Tmin | 184 | 166 | 184 | 178 | 181 | 176 |
Duration of sunshine | 276 | 329 | 351 | 283 | 349 | 379 |
Precipitation | 186 | 168 | 187 | 181 | 186 | 180 |
Humidity/Visibility | 174 | 157 | 181 | 176 | 183 | 177 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 180 | 184 | 202 | 209 | 203 | 214 |
Tmin | 182 | 188 | 205 | 209 | 200 | 212 |
Duration of sunshine | 330 | 306 | 377 | 340 | 260 | 189 |
Precipitation | 187 | 190 | 210 | 215 | 210 | 217 |
Humidity/Visibility | 183 | 183 | 206 | 206 | 200 | 211 |
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. |