Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 38 | 30 | 50 | 61 | 64 | 59 |
Tmin | 38 | 33 | 50 | 68 | 74 | 65 |
Duration of sunshine | 93 | 113 | 217 | 150 | 124 | 90 |
Precipitation | 145 | 127 | 148 | 180 | 171 | 163 |
Humidity/Visibility | 70 | 68 | 79 | 102 | 93 | 89 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 74 | 63 | 69 | 60 | 35 | 40 |
Tmin | 71 | 67 | 73 | 62 | 42 | 38 |
Duration of sunshine | 93 | 93 | 180 | 217 | 30 | 124 |
Precipitation | 176 | 184 | 185 | 179 | 156 | 168 |
Humidity/Visibility | 112 | 107 | 111 | 92 | 71 | 82 |
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. |