Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 60 | 48 | 59 | 55 | 59 | 32 |
Tmin | 73 | 69 | 81 | 83 | 87 | 51 |
Duration of sunshine | 73 | 70 | 81 | 82 | 87 | 50 |
Precipitation | 173 | 164 | 179 | 183 | 181 | 164 |
Humidity/Visibility | 62 | 64 | 70 | 72 | 75 | 52 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 58 | 62 | 54 | 57 | 56 | 57 |
Tmin | 77 | 84 | 84 | 77 | 63 | 85 |
Duration of sunshine | 78 | 84 | 84 | 77 | 63 | 86 |
Precipitation | 177 | 165 | 203 | 179 | 200 | 190 |
Humidity/Visibility | 66 | 70 | 88 | 74 | 69 | 76 |
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. |