Questions & Answers about Það rignir mikið í dag.
Yes. Það here is a dummy / expletive pronoun, just like English weather “it” in “It’s raining” or “It’s cold”.
- There is no real “thing” that það refers to.
- It’s just there to fill the subject slot in the sentence.
In spoken Icelandic, það can be dropped in casual speech:
- (Það) rignir mikið í dag. – perfectly natural in conversation.
But in neutral, careful language, including writing, you usually keep það.
Icelandic prefers to use a verb for the weather itself:
- að rigna = to rain
- það rignir = it rains / it is raining
Using “er” + a noun or adjective is much less common for this idea. You can say:
- Það er mikil rigning í dag. – There is a lot of rain today.
but Það rignir mikið í dag is the most natural way to say that it’s really raining a lot today.
You would not normally say “Það er rignandi” for the weather.