Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 332 | 295 | 334 | 331 | 347 | 334 |
Tmin | 335 | 293 | 334 | 338 | 349 | 329 |
Duration of sunshine | 248 | 225 | 279 | 270 | 310 | 300 |
Precipitation | 93 | 85 | 95 | 108 | 124 | 120 |
Humidity/Visibility | 92 | 84 | 91 | 104 | 123 | 118 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 346 | 340 | 332 | 365 | 359 | 366 |
Tmin | 347 | 341 | 332 | 366 | 358 | 372 |
Duration of sunshine | 310 | 248 | 270 | 279 | 240 | 248 |
Precipitation | 126 | 127 | 120 | 122 | 120 | 124 |
Humidity/Visibility | 122 | 121 | 117 | 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. |