Viileällä
Viileällä is the adessive singular form of the Finnish adjective viileä, meaning cool, chilly, or fresh. It is used in connection with a noun in the adessive case to express a state or condition of that noun, often referring to weather, atmosphere, or air. Typical phrases include viileällä ilmalla (in cool air) and viileällä säällä (in cool weather). In these constructions viileällä does not function as a standalone adverb; instead it modifies a noun within a prepositional-like phrase that describes the surrounding conditions.
Viileällä conveys that the relevant noun is in a cool or refreshing state. The expression is common
As with other adjectives in Finnish, viileä declines to match the case and number of the noun
Viileä comes from Finnish roots meaning cool or chilly. The word is used in modern Finnish with