- I never translate others' poetry... but to me this particular poem by Verlaine is pretty straightforward in language without much allusive or metaphorical style... so I rendered it in English for the fun of it (obviously losing the rhyming scheme).  Here's the non-poésie version, I guess... I don't know if it belongs along the translations which have been offered already 'cause my approach might be more literal... 'cause, you know, I'm not a poet and all that stuff... but as a francophone, I thought I'd share my perspective :) ... 

Il pleure dans mon cœur

Comme il pleut sur la ville ;

Quelle est cette langueur

Qui pénètre mon cœur ?

Tears are flowing in my heart

As how it rains over the city;

What is this languidness

Which enters my heart?

Ô bruit doux de la pluie

Par terre et sur les toits !

Pour un cœur qui s’ennuie,

Ô le chant de la pluie !

O soft drumming of the rain

On the ground and on the roofs!

For a heart taken by tedium,

O the song of the rain!

Il pleure sans raison

Dans ce cœur qui s’écœure.

Quoi ! nulle trahison ?…

Ce deuil est sans raison.

Tears come without a reason

In this heart which gets disgusted.

What!  no betrayals whatsoever?...

This mourning is senseless.

C’est bien la pire peine

De ne savoir pourquoi

Sans amour et sans haine

Mon cœur a tant de peine !

It is indeed the worst sorrow

To not know why

Without love and without hate

My heart has so much sadness!