Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 620 | 560 | 620 | 600 | 620 | 600 |
Tmin | 620 | 560 | 620 | 600 | 620 | 600 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 61 | 54 | 56 | 34 | 57 | 47 |
Humidity/Visibility | 56 | 51 | 50 | 30 | 45 | 40 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 620 | 620 | 600 | 620 | 600 | 620 |
Tmin | 620 | 620 | 600 | 620 | 600 | 620 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 59 | 56 | 49 | 43 | 54 | 61 |
Humidity/Visibility | 47 | 43 | 37 | 34 | 40 | 36 |
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. |