Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 483 | 433 | 483 | 463 | 478 | 466 |
Tmin | 480 | 435 | 476 | 463 | 482 | 468 |
Duration of sunshine | 289 | 265 | 289 | 370 | 356 | 317 |
Precipitation | 157 | 149 | 164 | 165 | 155 | 154 |
Humidity/Visibility | 141 | 127 | 137 | 129 | 134 | 133 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 485 | 501 | 480 | 488 | 468 | 485 |
Tmin | 485 | 504 | 488 | 491 | 473 | 484 |
Duration of sunshine | 392 | 376 | 337 | 330 | 318 | 321 |
Precipitation | 157 | 193 | 188 | 193 | 157 | 170 |
Humidity/Visibility | 145 | 160 | 156 | 149 | 137 | 144 |
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. |