Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 60 | 56 | 58 | 71 | 82 | 60 |
Tmin | 60 | 57 | 57 | 69 | 82 | 57 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 65 | 57 | 64 | 83 | 98 | 103 |
Humidity/Visibility | 60 | 56 | 58 | 72 | 80 | 58 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 58 | 62 | 57 | 62 | 59 | 91 |
Tmin | 57 | 59 | 59 | 60 | 62 | 91 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 98 | 98 | 90 | 92 | 91 | 95 |
Humidity/Visibility | 57 | 60 | 57 | 59 | 62 | 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. |