Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 333 | 303 | 337 | 343 | 369 | 354 |
Tmin | 332 | 301 | 335 | 337 | 365 | 357 |
Duration of sunshine | 32 | 56 | 124 | 90 | 31 | 30 |
Precipitation | 102 | 90 | 99 | 113 | 130 | 124 |
Humidity/Visibility | 88 | 79 | 90 | 102 | 117 | 117 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 365 | 362 | 355 | 359 | 350 | 364 |
Tmin | 361 | 365 | 347 | 361 | 349 | 367 |
Duration of sunshine | 31 | 32 | 61 | 32 | 30 | 31 |
Precipitation | 137 | 127 | 127 | 129 | 130 | 128 |
Humidity/Visibility | 118 | 118 | 115 | 113 | 110 | 122 |
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. |