Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 369 | 336 | 371 | 374 | 391 | 386 |
Tmin | 370 | 337 | 371 | 373 | 394 | 385 |
Duration of sunshine | 304 | 311 | 308 | 312 | 390 | 357 |
Precipitation | 64 | 57 | 62 | 80 | 104 | 92 |
Humidity/Visibility | 61 | 56 | 60 | 73 | 81 | 88 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 401 | 398 | 385 | 397 | 385 | 399 |
Tmin | 396 | 399 | 385 | 394 | 382 | 399 |
Duration of sunshine | 363 | 398 | 384 | 361 | 292 | 304 |
Precipitation | 100 | 96 | 90 | 90 | 94 | 96 |
Humidity/Visibility | 90 | 88 | 86 | 85 | 86 | 91 |
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. |