Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 62 | 57 | 62 | 72 | 91 | 89 |
Tmin | 62 | 57 | 58 | 73 | 91 | 86 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 63 | 57 | 62 | 75 | 93 | 90 |
Humidity/Visibility | 60 | 56 | 61 | 74 | 91 | 83 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 91 | 91 | 89 | 88 | 86 | 93 |
Tmin | 85 | 87 | 88 | 88 | 86 | 90 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 96 | 94 | 90 | 91 | 93 | 97 |
Humidity/Visibility | 90 | 89 | 87 | 86 | 86 | 90 |
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. |