Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 1105 | 1002 | 1108 | 1070 | 1108 | 1077 |
Tmin | 1108 | 1004 | 1107 | 1069 | 1114 | 1078 |
Duration of sunshine | 155 | 140 | 186 | 180 | 217 | 240 |
Precipitation | 186 | 170 | 186 | 183 | 186 | 180 |
Humidity/Visibility | 179 | 164 | 178 | 170 | 181 | 177 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 1110 | 1110 | 1100 | 1131 | 1104 | 1142 |
Tmin | 1111 | 1110 | 1105 | 1131 | 1105 | 1142 |
Duration of sunshine | 186 | 124 | 180 | 279 | 180 | 186 |
Precipitation | 188 | 190 | 211 | 215 | 210 | 217 |
Humidity/Visibility | 182 | 179 | 200 | 201 | 203 | 209 |
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. |