Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 60 | 57 | 62 | 74 | 68 | 58 |
Tmin | 61 | 57 | 60 | 74 | 68 | 59 |
Duration of sunshine | 59 | 56 | 59 | 72 | 66 | 58 |
Precipitation | 63 | 58 | 63 | 81 | 93 | 92 |
Humidity/Visibility | 61 | 56 | 61 | 73 | 91 | 89 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 61 | 61 | 60 | 58 | 58 | 62 |
Tmin | 56 | 60 | 56 | 57 | 58 | 61 |
Duration of sunshine | 56 | 60 | 58 | 56 | 56 | 61 |
Precipitation | 96 | 94 | 92 | 90 | 95 | 94 |
Humidity/Visibility | 91 | 91 | 88 | 86 | 87 | 92 |
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. |