Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1158 | 1063 | 1167 | 1131 | 1165 | 1132 |
| Tmin | 1157 | 1062 | 1169 | 1133 | 1168 | 1135 |
| słońce (godz.) | 62 | 85 | 124 | 150 | 155 | 60 |
| opad | 164 | 150 | 157 | 160 | 157 | 152 |
| wilgotność / widzialność | 122 | 111 | 103 | 97 | 100 | 100 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1164 | 1173 | 1157 | 1192 | 1153 | 1185 |
| Tmin | 1171 | 1171 | 1151 | 1196 | 1148 | 1189 |
| słońce (godz.) | 155 | 124 | 120 | 124 | 90 | 93 |
| opad | 159 | 160 | 187 | 189 | 206 | 207 |
| wilgotność / widzialność | 104 | 107 | 126 | 145 | 130 | 142 |
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. |
