Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1213 | 1109 | 1221 | 1184 | 1220 | 1180 |
| Tmin | 1192 | 1089 | 1205 | 1170 | 1204 | 1167 |
| słońce (godz.) | 62 | 113 | 124 | 150 | 155 | 90 |
| opad | 186 | 163 | 181 | 174 | 179 | 171 |
| wilgotność / widzialność | 154 | 137 | 151 | 147 | 153 | 147 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1221 | 1225 | 1216 | 1259 | 1221 | 1238 |
| Tmin | 1206 | 1208 | 1191 | 1234 | 1191 | 1235 |
| słońce (godz.) | 155 | 124 | 120 | 124 | 90 | 93 |
| opad | 183 | 181 | 208 | 214 | 209 | 198 |
| wilgotność / widzialność | 154 | 156 | 176 | 177 | 178 | 180 |
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. |
