Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 1017 | 901 | 1010 | 982 | 1009 | 967 |
Tmin | 1027 | 914 | 1007 | 976 | 1018 | 979 |
Duration of sunshine | 103 | 78 | 89 | 86 | 90 | 83 |
Precipitation | 157 | 142 | 171 | 177 | 163 | 149 |
Humidity/Visibility | 139 | 124 | 134 | 117 | 120 | 129 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 1012 | 1030 | 985 | 1011 | 977 | 1011 |
Tmin | 1006 | 1023 | 984 | 1008 | 972 | 1014 |
Duration of sunshine | 85 | 106 | 88 | 82 | 71 | 84 |
Precipitation | 159 | 192 | 199 | 186 | 170 | 172 |
Humidity/Visibility | 110 | 131 | 158 | 157 | 128 | 142 |
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. |