Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 180 | 174 | 190 | 180 | 181 | 168 |
| Tmin | 189 | 167 | 200 | 191 | 179 | 160 |
| słońce (godz.) | 120 | 106 | 136 | 127 | 112 | 95 |
| opad | 166 | 158 | 168 | 172 | 180 | 170 |
| wilgotność / widzialność | 113 | 107 | 120 | 116 | 109 | 97 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 181 | 189 | 200 | 207 | 195 | 197 |
| Tmin | 175 | 193 | 216 | 223 | 214 | 196 |
| słońce (godz.) | 110 | 131 | 154 | 156 | 143 | 129 |
| opad | 187 | 177 | 187 | 193 | 202 | 220 |
| wilgotność / widzialność | 115 | 119 | 140 | 133 | 135 | 129 |
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. |
