Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 60 | 55 | 61 | 70 | 92 | 82 |
Tmin | 59 | 55 | 61 | 65 | 88 | 79 |
Duration of sunshine | 58 | 55 | 61 | 64 | 85 | 79 |
Precipitation | 66 | 58 | 62 | 88 | 97 | 101 |
Humidity/Visibility | 58 | 54 | 60 | 68 | 88 | 82 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 57 | 91 | 87 | 63 | 57 | 60 |
Tmin | 54 | 85 | 88 | 62 | 60 | 60 |
Duration of sunshine | 53 | 88 | 86 | 59 | 60 | 60 |
Precipitation | 102 | 97 | 92 | 93 | 90 | 94 |
Humidity/Visibility | 56 | 87 | 86 | 61 | 59 | 60 |
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. |