Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 58 | 49 | 60 | 75 | 92 | 88 |
Tmin | 56 | 48 | 57 | 72 | 89 | 85 |
Duration of sunshine | 243 | 272 | 336 | 311 | 395 | 326 |
Precipitation | 63 | 58 | 62 | 75 | 94 | 93 |
Humidity/Visibility | 61 | 49 | 61 | 73 | 90 | 87 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 93 | 89 | 87 | 88 | 86 | 90 |
Tmin | 87 | 84 | 87 | 88 | 85 | 89 |
Duration of sunshine | 301 | 301 | 296 | 394 | 321 | 333 |
Precipitation | 95 | 100 | 90 | 92 | 92 | 93 |
Humidity/Visibility | 91 | 88 | 87 | 86 | 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. |