Why is と here?

[Tantivy]

I’ve never seen と be used in this way. Why is と after 暑い?

明日は暑いと思います
I think it will be hot tomorrow.

I’m not great at grammar so there’s probably a use of と that I don’t know of

[Tantivy]

There’s also a similar sentence but this time it has だ in front of と:
明日は多分雨だと思います

[Daru]

Hey @Tantivy !

That’s because you’re looking at the と思う expression.
You can learn more about it here!

Let me know if you’ve more questions.

[Tantivy]

Thank you so much!