Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 176 | 163 | 164 | 163 | 166 | 170 |
| Tmin | 171 | 153 | 160 | 163 | 148 | 164 |
| słońce (godz.) | 150 | 144 | 141 | 126 | 110 | 122 |
| opad | 186 | 168 | 180 | 175 | 182 | 178 |
| wilgotność / widzialność | 153 | 137 | 143 | 139 | 146 | 147 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 171 | 167 | 197 | 192 | 196 | 187 |
| Tmin | 151 | 151 | 174 | 176 | 159 | 174 |
| słońce (godz.) | 142 | 140 | 142 | 154 | 125 | 133 |
| opad | 188 | 182 | 206 | 210 | 203 | 213 |
| wilgotność / widzialność | 152 | 144 | 156 | 163 | 153 | 166 |
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. |
