Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1067 | 951 | 1071 | 1040 | 1078 | 1025 |
| Tmin | 1072 | 965 | 1077 | 1045 | 1082 | 1038 |
| słońce (godz.) | 136 | 120 | 133 | 128 | 139 | 129 |
| opad | 155 | 140 | 155 | 151 | 155 | 160 |
| wilgotność / widzialność | 145 | 127 | 148 | 143 | 151 | 138 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1073 | 1094 | 1078 | 1089 | 1061 | 1071 |
| Tmin | 1074 | 1094 | 1079 | 1087 | 1068 | 1075 |
| słońce (godz.) | 139 | 157 | 176 | 140 | 137 | 140 |
| opad | 160 | 191 | 210 | 219 | 197 | 172 |
| wilgotność / widzialność | 149 | 163 | 187 | 176 | 164 | 147 |
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. |
