Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 59 | 56 | 62 | 58 | 60 | 69 |
Tmin | 61 | 57 | 59 | 57 | 61 | 68 |
Duration of sunshine | 1 | 0 | 0 | 0 | 2 | 0 |
Precipitation | 64 | 57 | 62 | 68 | 66 | 76 |
Humidity/Visibility | 60 | 56 | 60 | 58 | 60 | 68 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 85 | 86 | 84 | 85 | 87 | 93 |
Tmin | 84 | 85 | 84 | 82 | 84 | 88 |
Duration of sunshine | 1 | 1 | 0 | 1 | 0 | 0 |
Precipitation | 100 | 98 | 95 | 98 | 91 | 96 |
Humidity/Visibility | 86 | 85 | 85 | 82 | 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. |