Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 104 | 77 | 84 | 99 | 101 | 107 |
Tmin | 107 | 71 | 81 | 99 | 108 | 109 |
Duration of sunshine | 186 | 226 | 248 | 240 | 186 | 270 |
Precipitation | 142 | 128 | 146 | 175 | 164 | 154 |
Humidity/Visibility | 113 | 103 | 114 | 129 | 136 | 138 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 84 | 74 | 78 | 67 | 54 | 59 |
Tmin | 88 | 75 | 74 | 68 | 51 | 58 |
Duration of sunshine | 248 | 217 | 270 | 248 | 240 | 186 |
Precipitation | 161 | 166 | 158 | 154 | 158 | 175 |
Humidity/Visibility | 136 | 126 | 121 | 137 | 128 | 136 |
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. |