| Sg | Pl | |
| Nom | veðr | veðr (rule) |
| Acc | veðr (rule) | veðr (rule) |
| Dat | veðri (rule) | veðrum (rule) |
| Gen | veðrs (rule) | veðra (rule) |
| Sg | Pl | |
| Nom | veðrit (rule) | veðrin (rule) |
| Acc | veðrit (rule) | veðrin (rule) |
| Dat | veðrinu (rule) | veðrunum (rule) |
| Gen | veðrsins (rule) | veðranna (rule) |