Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 326 | 309 | 323 | 322 | 327 | 302 |
Tmin | 326 | 307 | 324 | 322 | 328 | 302 |
Duration of sunshine | 93 | 56 | 93 | 60 | 93 | 60 |
Precipitation | 95 | 87 | 101 | 108 | 97 | 95 |
Humidity/Visibility | 7 | 12 | 6 | 12 | 7 | 3 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 323 | 340 | 324 | 322 | 311 | 323 |
Tmin | 323 | 340 | 323 | 322 | 311 | 324 |
Duration of sunshine | 124 | 124 | 90 | 93 | 90 | 62 |
Precipitation | 105 | 110 | 109 | 109 | 126 | 126 |
Humidity/Visibility | 8 | 17 | 17 | 13 | 8 | 9 |
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. |