Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 41 | 33 | 65 | 71 | 72 | 75 |
Tmin | 40 | 36 | 46 | 52 | 68 | 76 |
Duration of sunshine | 62 | 57 | 155 | 120 | 124 | 120 |
Precipitation | 132 | 106 | 132 | 171 | 186 | 181 |
Humidity/Visibility | 75 | 67 | 82 | 88 | 97 | 106 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 60 | 59 | 72 | 63 | 39 | 34 |
Tmin | 71 | 61 | 68 | 59 | 45 | 42 |
Duration of sunshine | 31 | 124 | 150 | 155 | 60 | 62 |
Precipitation | 171 | 186 | 180 | 179 | 158 | 184 |
Humidity/Visibility | 101 | 93 | 107 | 94 | 77 | 83 |
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. |