Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 185 | 164 | 186 | 176 | 184 | 179 |
Tmin | 184 | 165 | 178 | 177 | 184 | 174 |
Duration of sunshine | 260 | 236 | 260 | 292 | 330 | 312 |
Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
Humidity/Visibility | 184 | 165 | 184 | 176 | 184 | 177 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 183 | 184 | 205 | 209 | 207 | 213 |
Tmin | 179 | 185 | 207 | 211 | 208 | 217 |
Duration of sunshine | 289 | 268 | 272 | 310 | 262 | 299 |
Precipitation | 186 | 190 | 210 | 217 | 210 | 217 |
Humidity/Visibility | 183 | 183 | 205 | 208 | 205 | 214 |
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. |