Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 171 | 158 | 176 | 166 | 178 | 173 |
Tmin | 179 | 161 | 179 | 173 | 184 | 172 |
Duration of sunshine | 274 | 243 | 303 | 293 | 308 | 294 |
Precipitation | 191 | 174 | 200 | 187 | 190 | 182 |
Humidity/Visibility | 179 | 164 | 180 | 174 | 181 | 175 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 172 | 169 | 201 | 202 | 197 | 210 |
Tmin | 177 | 180 | 201 | 200 | 202 | 204 |
Duration of sunshine | 300 | 305 | 323 | 292 | 320 | 326 |
Precipitation | 193 | 202 | 221 | 223 | 218 | 231 |
Humidity/Visibility | 179 | 176 | 200 | 200 | 202 | 206 |
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. |