Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 72 | 73 | 74 | 69 | 47 | 61 |
Tmin | 77 | 86 | 87 | 89 | 53 | 64 |
Duration of sunshine | 75 | 78 | 80 | 82 | 50 | 64 |
Precipitation | 148 | 129 | 149 | 129 | 122 | 133 |
Humidity/Visibility | 68 | 68 | 69 | 68 | 61 | 74 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 70 | 62 | 53 | 46 | 51 | 60 |
Tmin | 70 | 72 | 63 | 60 | 63 | 76 |
Duration of sunshine | 67 | 67 | 61 | 62 | 61 | 68 |
Precipitation | 141 | 133 | 120 | 116 | 152 | 139 |
Humidity/Visibility | 83 | 75 | 62 | 47 | 63 | 71 |
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. |