Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 117 | 109 | 123 | 139 | 149 | 146 |
| Tmin | 117 | 107 | 118 | 137 | 154 | 140 |
| słońce (godz.) | 1 | 1 | 0 | 0 | 0 | 1 |
| opad | 124 | 112 | 124 | 147 | 155 | 152 |
| wilgotność / widzialność | 121 | 110 | 121 | 142 | 153 | 147 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 146 | 147 | 144 | 142 | 143 | 148 |
| Tmin | 144 | 152 | 147 | 140 | 148 | 150 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 156 | 156 | 151 | 150 | 150 | 156 |
| wilgotność / widzialność | 152 | 150 | 147 | 143 | 147 | 153 |
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. |
