"Sí, llueve."

Yes but Spanish often drops subjects. The fact that this verb is impersonal would seemingly have little bearing on the absence of the subject.

You need the conjugation when you read Frida Kahlo:

Tú me llueves – yo te cielo

Tú la finura, la niñez, la vida

amor mío – niño – viejo

madre y centro – azul – ternura

Yo te entrego mi universo y tú me vives

Eres tú a quien amo hoy

te amo con todos los amores

te daré el bosque con una casita dentro

con todo lo bueno que haya

en mi construcción tu vivirás contento

yo quiero que tu vivas contento.

Aunque yo te daré siempre

mi soledad absurda y la monotonía

de toda una complejísima diversidad de amores

¿Quieres? Hoy amando los principios y tú amas

– te a tu madre

Frida Kahlo

You rain on me - I sky you http://thediaryjunction.blogspot.gr/2014/07/thanks-to-my-diego.html

Yes you are correct. the verb llover is used only in the third person singular of the verb,which is the same as in English. We can only use third person singular because it is one of the verbs such as 'snow' that is non personal and can not be conjugated in any other person but third. For example: I rain, you rain; we snow, etc does not exist. You can say it rained, it was snowing, it did rain (all third person).

To rain or to snow are impersonal verbs that are only conjugated in third person singular. Although this verb can be conjugated for any person, it normally is only used (impersonally) in the third person singular, e.g.: llueve,it rains, it is raining. It has nothing to do with crying. This is the same as in English, Italian etc. There is no need to say I rain, you rain, we snow, they snow, etc. Any other use of the verb would be maybe colloquial expressions like " I rained on her parade".

As an aside, I wonder if that kind of conjugation is ever used in poetry.

DL accepts "It is raining" as an answer for "Llueve"

yes, it is

It is my understanding that "sí" with an accent is just for the word yes. Si with no accent is for "if." I didn't even notice the "if" word until you mentioned it. A comma/pause in the sentence is usually a dead giveaway for me if I wasn't looking for the accent.

Your use of rain is a noun, not a verb. thanks

The drop down has various uses. Most commonly it shows a word as used in alternate ways which do not apply to the current sentence... so the shown words are not substitutes. But sometimes all the words apply. The way it all works is an inconsistent poor design.

I think that is because there would need to be the object "it" for that to be a correct translation. Si, lo llueve = Yes, it leaks. The "it" being a faucet or some object that the water is leaking from.

Because ‘llueve’ is a verb meaning ‘it rains’. ‘Lluvia’ is a noun meaning ‘rain’.

I'd prefer 'Yes, it's raining' too, Pok, normally rendered as 'Sí, está lloviendo.'

Analytically, the English grammar of 'It rains' could imply that we were talking about general facts (e.g. a Central American person warning visitors that not every day is dry there). Spaniards, however, don't use the continuous (-ie/-a + -ndo i.e. -ing ending) aspect as widely (speaking from personal experience teaching in Madrid).

In this case, a simple 'Sí, (ahora) llueve' may mean that 'Yes, it is raining (now)'.

It is grammatically correct but the continuous tense with the present participle, raining, is normal. I tried it and DL accepted it. It does not always accept the continuous tense when a simple present tense is translated. I don't know if the continuous tense ie used more in English than in Spanish.