Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 310 | 280 | 310 | 300 | 310 | 300 |
Tmin | 371 | 337 | 371 | 373 | 399 | 386 |
Duration of sunshine | 55 | 55 | 61 | 72 | 87 | 84 |
Precipitation | 62 | 57 | 62 | 76 | 92 | 90 |
Humidity/Visibility | 30 | 28 | 30 | 37 | 45 | 43 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 310 | 310 | 300 | 310 | 300 | 310 |
Tmin | 393 | 400 | 385 | 395 | 389 | 402 |
Duration of sunshine | 80 | 90 | 85 | 84 | 86 | 90 |
Precipitation | 92 | 94 | 88 | 88 | 91 | 93 |
Humidity/Visibility | 44 | 45 | 43 | 43 | 43 | 46 |
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. |