Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 488 | 439 | 494 | 475 | 490 | 474 |
Tmin | 489 | 442 | 486 | 473 | 492 | 469 |
Duration of sunshine | 170 | 155 | 171 | 162 | 175 | 163 |
Precipitation | 189 | 169 | 186 | 181 | 186 | 180 |
Humidity/Visibility | 172 | 154 | 172 | 173 | 175 | 167 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 483 | 481 | 498 | 514 | 500 | 517 |
Tmin | 481 | 479 | 497 | 511 | 504 | 513 |
Duration of sunshine | 167 | 162 | 190 | 194 | 193 | 195 |
Precipitation | 186 | 190 | 212 | 215 | 210 | 220 |
Humidity/Visibility | 167 | 162 | 199 | 199 | 190 | 197 |
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. |