Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 676 | 611 | 668 | 669 | 704 | 685 |
Tmin | 678 | 612 | 669 | 667 | 705 | 686 |
Duration of sunshine | 248 | 254 | 217 | 240 | 186 | 270 |
Precipitation | 130 | 116 | 138 | 143 | 155 | 150 |
Humidity/Visibility | 118 | 109 | 113 | 131 | 150 | 147 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 709 | 706 | 688 | 703 | 684 | 701 |
Tmin | 712 | 709 | 688 | 702 | 686 | 705 |
Duration of sunshine | 186 | 279 | 300 | 310 | 270 | 279 |
Precipitation | 159 | 161 | 154 | 155 | 156 | 167 |
Humidity/Visibility | 152 | 150 | 147 | 147 | 146 | 143 |
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. |