Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 62 | 52 | 39 | 43 | 35 | 54 |
Tmin | 80 | 59 | 59 | 62 | 56 | 59 |
Duration of sunshine | 75 | 57 | 52 | 62 | 55 | 55 |
Precipitation | 133 | 141 | 158 | 154 | 171 | 162 |
Humidity/Visibility | 72 | 63 | 65 | 70 | 72 | 77 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 55 | 62 | 56 | 58 | 55 | 67 |
Tmin | 69 | 73 | 68 | 61 | 54 | 72 |
Duration of sunshine | 69 | 74 | 67 | 64 | 52 | 76 |
Precipitation | 176 | 180 | 172 | 175 | 183 | 183 |
Humidity/Visibility | 89 | 100 | 90 | 90 | 82 | 95 |
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. |