Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 89 | 71 | 83 | 81 | 76 | 76 |
Tmin | 85 | 74 | 82 | 70 | 78 | 77 |
Duration of sunshine | 124 | 196 | 279 | 180 | 279 | 270 |
Precipitation | 138 | 118 | 143 | 183 | 160 | 153 |
Humidity/Visibility | 112 | 99 | 108 | 125 | 137 | 134 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 75 | 71 | 82 | 83 | 74 | 80 |
Tmin | 75 | 74 | 77 | 73 | 72 | 72 |
Duration of sunshine | 248 | 155 | 270 | 279 | 210 | 217 |
Precipitation | 167 | 169 | 161 | 160 | 147 | 152 |
Humidity/Visibility | 133 | 125 | 130 | 131 | 101 | 109 |
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. |