Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1138 | 1054 | 1175 | 1132 | 1164 | 1133 |
| Tmin | 1132 | 1055 | 1172 | 1136 | 1169 | 1130 |
| słońce (godz.) | 92 | 82 | 104 | 102 | 94 | 75 |
| opad | 187 | 169 | 187 | 184 | 188 | 184 |
| wilgotność / widzialność | 166 | 148 | 168 | 161 | 163 | 162 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1125 | 1149 | 1143 | 1199 | 1137 | 1171 |
| Tmin | 1131 | 1153 | 1143 | 1201 | 1137 | 1180 |
| słońce (godz.) | 89 | 101 | 110 | 108 | 92 | 85 |
| opad | 189 | 190 | 207 | 215 | 212 | 226 |
| wilgotność / widzialność | 169 | 170 | 185 | 189 | 192 | 201 |
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. |
