Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 340 | 305 | 339 | 336 | 364 | 350 |
Tmin | 340 | 305 | 335 | 340 | 360 | 354 |
Duration of sunshine | 248 | 225 | 248 | 270 | 310 | 300 |
Precipitation | 93 | 85 | 95 | 109 | 124 | 120 |
Humidity/Visibility | 92 | 84 | 92 | 104 | 122 | 118 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 359 | 340 | 333 | 365 | 356 | 365 |
Tmin | 360 | 341 | 333 | 364 | 357 | 371 |
Duration of sunshine | 310 | 310 | 300 | 279 | 240 | 279 |
Precipitation | 126 | 127 | 120 | 124 | 120 | 124 |
Humidity/Visibility | 122 | 122 | 118 | 117 | 118 | 123 |
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. |