Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1140 | 1035 | 1159 | 1136 | 1165 | 1107 |
| Tmin | 1176 | 1064 | 1186 | 1177 | 1218 | 1180 |
| słońce (godz.) | 98 | 85 | 111 | 126 | 130 | 126 |
| opad | 158 | 152 | 183 | 180 | 181 | 181 |
| wilgotność / widzialność | 80 | 69 | 91 | 95 | 98 | 93 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1137 | 1144 | 1103 | 1151 | 1086 | 1120 |
| Tmin | 1219 | 1225 | 1199 | 1222 | 1207 | 1246 |
| słońce (godz.) | 136 | 138 | 145 | 135 | 148 | 160 |
| opad | 187 | 190 | 198 | 191 | 210 | 193 |
| wilgotność / widzialność | 99 | 99 | 100 | 91 | 91 | 93 |
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. |
