Compound of koiran (“dog's”) + ilma (“weather”). One explanation is that since dogs were used to guard the house and stayed outdoors regardless of the weather, the idiom would have developed from a meaning such as "a weather that only a dog has to bear".
Similar idioms are also found in other European languages, such as German Hundewetter.
koiranilma
| Inflection of koiranilma (Kotus type 9/kala, no gradation) | |||
|---|---|---|---|
| nominative | koiranilma | koiranilmat | |
| genitive | koiranilman | koiranilmojen | |
| partitive | koiranilmaa | koiranilmoja | |
| illative | koiranilmaan | koiranilmoihin | |
| singular | plural | ||
| nominative | koiranilma | koiranilmat | |
| accusative | nom. | koiranilma | koiranilmat |
| gen. | koiranilman | ||
| genitive | koiranilman | koiranilmojen koiranilmain rare | |
| partitive | koiranilmaa | koiranilmoja | |
| inessive | koiranilmassa | koiranilmoissa | |
| elative | koiranilmasta | koiranilmoista | |
| illative | koiranilmaan | koiranilmoihin | |
| adessive | koiranilmalla | koiranilmoilla | |
| ablative | koiranilmalta | koiranilmoilta | |
| allative | koiranilmalle | koiranilmoille | |
| essive | koiranilmana | koiranilmoina | |
| translative | koiranilmaksi | koiranilmoiksi | |
| abessive | koiranilmatta | koiranilmoitta | |
| instructive | — | koiranilmoin | |
| comitative | See the possessive forms below. | ||