Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 950 | 867 | 960 | 945 | 988 | 955 |
| Tmin | 892 | 808 | 897 | 885 | 924 | 896 |
| słońce (godz.) | 248 | 226 | 186 | 210 | 279 | 180 |
| opad | 94 | 85 | 95 | 107 | 123 | 121 |
| wilgotność / widzialność | 85 | 84 | 92 | 105 | 121 | 116 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 975 | 980 | 959 | 985 | 958 | 980 |
| Tmin | 915 | 916 | 897 | 925 | 897 | 925 |
| słońce (godz.) | 217 | 217 | 210 | 186 | 210 | 155 |
| opad | 128 | 126 | 121 | 121 | 121 | 124 |
| wilgotność / widzialność | 111 | 110 | 117 | 116 | 118 | 120 |
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. |
