Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 172 | 158 | 180 | 179 | 180 | 175 |
Tmin | 172 | 151 | 175 | 175 | 185 | 174 |
Duration of sunshine | 217 | 141 | 217 | 210 | 124 | 210 |
Precipitation | 183 | 166 | 187 | 181 | 186 | 182 |
Humidity/Visibility | 169 | 155 | 181 | 177 | 184 | 177 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 185 | 182 | 204 | 206 | 196 | 201 |
Tmin | 184 | 183 | 206 | 204 | 200 | 195 |
Duration of sunshine | 186 | 248 | 180 | 155 | 150 | 124 |
Precipitation | 186 | 190 | 212 | 215 | 210 | 212 |
Humidity/Visibility | 184 | 185 | 205 | 209 | 199 | 201 |
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. |