Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 128 | 116 | 139 | 131 | 138 | 131 |
| Tmin | 137 | 126 | 140 | 149 | 140 | 149 |
| słońce (godz.) | 134 | 119 | 117 | 112 | 140 | 121 |
| opad | 225 | 185 | 200 | 188 | 193 | 185 |
| wilgotność / widzialność | 139 | 130 | 139 | 138 | 143 | 128 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 130 | 129 | 157 | 140 | 114 | 136 |
| Tmin | 132 | 139 | 175 | 156 | 113 | 140 |
| słońce (godz.) | 95 | 91 | 138 | 115 | 85 | 113 |
| opad | 192 | 197 | 218 | 227 | 207 | 224 |
| wilgotność / widzialność | 122 | 110 | 142 | 158 | 141 | 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. |
