Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 40 | 30 | 62 | 72 | 66 | 70 |
Tmin | 48 | 38 | 51 | 61 | 64 | 65 |
Duration of sunshine | 62 | 85 | 217 | 120 | 62 | 120 |
Precipitation | 136 | 115 | 144 | 170 | 173 | 175 |
Humidity/Visibility | 76 | 73 | 87 | 100 | 97 | 104 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 75 | 60 | 65 | 63 | 43 | 38 |
Tmin | 67 | 71 | 65 | 66 | 44 | 35 |
Duration of sunshine | 93 | 124 | 120 | 217 | 60 | 93 |
Precipitation | 179 | 172 | 185 | 180 | 159 | 170 |
Humidity/Visibility | 113 | 105 | 108 | 93 | 84 | 88 |
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. |