Questions & Answers about Sää muuttuu kohta kylmäksi.
Why does kylmä have the -ksi ending here?
This is the translative case, which shows what something changes into. Because the verb muuttua means to change or to turn into, the new state (cold) must take the -ksi ending.
Why isn't there a word for 'will' in the Finnish sentence?
Finnish doesn't have a separate future tense. Instead, you use the present tense verb muuttuu (turns / changes) along with a time word like kohta (soon) to make it clear that the action will happen in the future.
Is muuttuu related to the verb muuttaa (to move or change something)?
Yes! Muuttua means that something changes by itself, like the weather turning cold. Muuttaa means that someone actively changes something else or moves to a new home. Finnish often pairs verbs like this depending on who is doing the action.
I have seen the word kohta used as a noun. What does it mean here?
As a noun, kohta means a point, spot, or section (like a point on a map or in a book). Here it is used as an adverb of time, which simply means soon or shortly.