Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1114 | 1004 | 1116 | 1104 | 1145 | 1109 |
| Tmin | 1116 | 1004 | 1112 | 1103 | 1146 | 1106 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 124 | 112 | 126 | 146 | 155 | 150 |
| wilgotność / widzialność | 123 | 111 | 121 | 143 | 153 | 148 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1144 | 1144 | 1107 | 1138 | 1107 | 1144 |
| Tmin | 1145 | 1144 | 1109 | 1137 | 1108 | 1146 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 157 | 159 | 152 | 153 | 152 | 155 |
| wilgotność / widzialność | 153 | 152 | 147 | 149 | 148 | 154 |
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. |
