Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 111 | 92 | 109 | 110 | 113 | 92 |
| Tmin | 124 | 104 | 114 | 115 | 116 | 111 |
| słońce (godz.) | 123 | 103 | 115 | 115 | 115 | 110 |
| opad | 154 | 138 | 157 | 147 | 155 | 149 |
| wilgotność / widzialność | 138 | 125 | 139 | 130 | 137 | 135 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 108 | 134 | 133 | 108 | 133 | 140 |
| Tmin | 113 | 136 | 140 | 112 | 138 | 140 |
| słońce (godz.) | 113 | 137 | 139 | 110 | 135 | 138 |
| opad | 166 | 190 | 181 | 150 | 150 | 159 |
| wilgotność / widzialność | 141 | 155 | 158 | 127 | 133 | 145 |
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. |
