Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 31 | 55 | 59 | 70 | 71 | 52 |
Tmin | 35 | 49 | 55 | 53 | 63 | 52 |
Duration of sunshine | 0 | 0 | 0 | 1 | 0 | 0 |
Precipitation | 62 | 58 | 67 | 83 | 106 | 108 |
Humidity/Visibility | 38 | 54 | 59 | 67 | 76 | 57 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 53 | 76 | 82 | 85 | 88 | 88 |
Tmin | 50 | 67 | 74 | 80 | 87 | 83 |
Duration of sunshine | 0 | 0 | 0 | 0 | 1 | 0 |
Precipitation | 109 | 106 | 98 | 95 | 92 | 97 |
Humidity/Visibility | 56 | 76 | 81 | 83 | 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. |