Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 99 | 82 | 102 | 103 | 111 | 104 |
Tmin | 65 | 63 | 69 | 73 | 73 | 82 |
Duration of sunshine | 31 | 56 | 31 | 0 | 62 | 30 |
Precipitation | 138 | 139 | 145 | 171 | 181 | 186 |
Humidity/Visibility | 88 | 77 | 95 | 93 | 102 | 95 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 114 | 110 | 114 | 114 | 88 | 96 |
Tmin | 90 | 69 | 90 | 79 | 58 | 80 |
Duration of sunshine | 31 | 31 | 60 | 31 | 30 | 31 |
Precipitation | 167 | 190 | 179 | 193 | 164 | 162 |
Humidity/Visibility | 108 | 97 | 109 | 104 | 72 | 88 |
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. |