Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 65 | 67 | 69 | 73 | 66 | 76 |
Tmin | 62 | 64 | 67 | 73 | 52 | 73 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 150 | 138 | 160 | 166 | 196 | 191 |
Humidity/Visibility | 59 | 62 | 64 | 73 | 75 | 83 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 61 | 67 | 59 | 64 | 69 | 51 |
Tmin | 58 | 75 | 72 | 62 | 69 | 67 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 175 | 185 | 171 | 179 | 201 | 164 |
Humidity/Visibility | 80 | 84 | 79 | 74 | 78 | 70 |
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. |