Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 37 | 32 | 60 | 62 | 79 | 73 |
Tmin | 44 | 39 | 56 | 69 | 78 | 77 |
Duration of sunshine | 62 | 57 | 248 | 150 | 93 | 90 |
Precipitation | 133 | 114 | 141 | 183 | 179 | 172 |
Humidity/Visibility | 72 | 70 | 87 | 109 | 110 | 116 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 79 | 71 | 79 | 69 | 47 | 39 |
Tmin | 66 | 67 | 69 | 67 | 50 | 45 |
Duration of sunshine | 93 | 93 | 210 | 217 | 60 | 124 |
Precipitation | 176 | 179 | 195 | 174 | 158 | 166 |
Humidity/Visibility | 118 | 112 | 115 | 98 | 86 | 89 |
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. |