Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 94 | 76 | 85 | 104 | 111 | 84 |
Tmin | 96 | 77 | 83 | 101 | 113 | 92 |
Duration of sunshine | 217 | 140 | 155 | 210 | 217 | 210 |
Precipitation | 136 | 122 | 148 | 167 | 168 | 132 |
Humidity/Visibility | 83 | 76 | 86 | 100 | 107 | 86 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 85 | 75 | 83 | 71 | 54 | 60 |
Tmin | 85 | 78 | 81 | 69 | 52 | 61 |
Duration of sunshine | 186 | 186 | 240 | 248 | 240 | 186 |
Precipitation | 149 | 161 | 159 | 156 | 132 | 130 |
Humidity/Visibility | 97 | 102 | 102 | 101 | 82 | 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. |