Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 101 | 95 | 99 | 106 | 140 | 105 |
Tmin | 102 | 94 | 101 | 104 | 143 | 113 |
Duration of sunshine | 101 | 95 | 99 | 105 | 139 | 105 |
Precipitation | 124 | 111 | 123 | 140 | 154 | 147 |
Humidity/Visibility | 57 | 56 | 64 | 58 | 84 | 70 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 126 | 150 | 138 | 131 | 125 | 149 |
Tmin | 125 | 150 | 138 | 132 | 124 | 153 |
Duration of sunshine | 125 | 149 | 138 | 135 | 124 | 153 |
Precipitation | 155 | 157 | 157 | 147 | 154 | 157 |
Humidity/Visibility | 74 | 90 | 89 | 78 | 62 | 73 |
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. |