Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 403 | 364 | 403 | 390 | 403 | 397 |
Tmin | 453 | 412 | 457 | 435 | 453 | 440 |
Duration of sunshine | 49 | 48 | 53 | 44 | 48 | 49 |
Precipitation | 124 | 124 | 139 | 168 | 169 | 147 |
Humidity/Visibility | 28 | 31 | 36 | 42 | 43 | 43 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 417 | 407 | 390 | 403 | 390 | 411 |
Tmin | 459 | 452 | 429 | 432 | 413 | 439 |
Duration of sunshine | 53 | 48 | 40 | 27 | 23 | 34 |
Precipitation | 159 | 160 | 159 | 135 | 158 | 164 |
Humidity/Visibility | 52 | 47 | 42 | 30 | 27 | 35 |
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. |