Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 333 | 305 | 338 | 323 | 332 | 327 |
Tmin | 338 | 305 | 336 | 325 | 334 | 323 |
Duration of sunshine | 182 | 164 | 181 | 165 | 165 | 164 |
Precipitation | 186 | 168 | 186 | 181 | 186 | 180 |
Humidity/Visibility | 182 | 167 | 183 | 176 | 179 | 177 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 336 | 337 | 355 | 364 | 353 | 371 |
Tmin | 339 | 340 | 356 | 362 | 354 | 368 |
Duration of sunshine | 164 | 161 | 190 | 191 | 204 | 208 |
Precipitation | 186 | 190 | 213 | 215 | 212 | 219 |
Humidity/Visibility | 182 | 182 | 204 | 209 | 204 | 213 |
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. |