Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 179 | 155 | 177 | 167 | 178 | 175 |
| Tmin | 176 | 155 | 174 | 171 | 174 | 171 |
| słońce (godz.) | 173 | 154 | 171 | 167 | 165 | 169 |
| opad | 186 | 168 | 186 | 181 | 188 | 180 |
| wilgotność / widzialność | 134 | 121 | 131 | 116 | 121 | 117 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 174 | 170 | 189 | 199 | 183 | 202 |
| Tmin | 172 | 170 | 184 | 201 | 183 | 205 |
| słońce (godz.) | 168 | 168 | 175 | 187 | 160 | 168 |
| opad | 186 | 190 | 207 | 226 | 210 | 220 |
| wilgotność / widzialność | 118 | 114 | 131 | 149 | 137 | 151 |
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. |
