Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 40 | 30 | 55 | 65 | 73 | 72 |
Tmin | 45 | 33 | 50 | 62 | 78 | 78 |
Duration of sunshine | 62 | 85 | 124 | 120 | 93 | 120 |
Precipitation | 128 | 108 | 146 | 181 | 189 | 180 |
Humidity/Visibility | 75 | 72 | 82 | 99 | 110 | 113 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 74 | 64 | 62 | 56 | 34 | 33 |
Tmin | 64 | 63 | 53 | 64 | 41 | 41 |
Duration of sunshine | 31 | 31 | 90 | 155 | 60 | 31 |
Precipitation | 184 | 186 | 183 | 167 | 154 | 162 |
Humidity/Visibility | 117 | 105 | 110 | 96 | 83 | 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. |