Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 123 | 108 | 122 | 139 | 153 | 131 |
Tmin | 123 | 110 | 120 | 141 | 154 | 132 |
Duration of sunshine | 31 | 28 | 62 | 60 | 62 | 60 |
Precipitation | 126 | 114 | 130 | 145 | 159 | 152 |
Humidity/Visibility | 122 | 109 | 120 | 138 | 152 | 147 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 120 | 96 | 89 | 84 | 59 | 58 |
Tmin | 122 | 95 | 88 | 85 | 60 | 62 |
Duration of sunshine | 62 | 62 | 60 | 62 | 60 | 62 |
Precipitation | 157 | 157 | 152 | 157 | 150 | 155 |
Humidity/Visibility | 151 | 152 | 147 | 145 | 145 | 150 |
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. |