Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1934 | 1759 | 1938 | 1883 | 1918 | 1880 |
| Tmin | 1933 | 1755 | 1941 | 1881 | 1921 | 1879 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 187 | 169 | 187 | 181 | 186 | 180 |
| wilgotność / widzialność | 180 | 164 | 180 | 175 | 177 | 172 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1933 | 1939 | 1902 | 1966 | 1913 | 1970 |
| Tmin | 1942 | 1942 | 1909 | 1971 | 1917 | 1969 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 186 | 190 | 211 | 215 | 211 | 217 |
| wilgotność / widzialność | 174 | 176 | 196 | 203 | 202 | 210 |
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. |
Ashland