Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1060 | 965 | 1075 | 1040 | 1078 | 1044 |
| Tmin | 1067 | 968 | 1069 | 1036 | 1067 | 1041 |
| słońce (godz.) | 124 | 116 | 129 | 119 | 122 | 126 |
| opad | 159 | 146 | 171 | 168 | 169 | 162 |
| wilgotność / widzialność | 103 | 94 | 103 | 101 | 100 | 96 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1067 | 1093 | 1057 | 1094 | 1048 | 1069 |
| Tmin | 1072 | 1095 | 1065 | 1087 | 1030 | 1072 |
| słońce (godz.) | 122 | 149 | 149 | 127 | 109 | 131 |
| opad | 165 | 190 | 186 | 197 | 190 | 176 |
| wilgotność / widzialność | 101 | 112 | 113 | 124 | 110 | 105 |
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. |
