What a rainy day!
And I got all wet this morning.
Here are some words and phrases for you to pick up on such a rainy day like this.

–pour with rain
to rain heavily (Said of the sky, day, morning, night, the weather, etc.)
e.g.
The sky was pouring with rain and the sun never shone from dawn to dusk. It poured with rain the entire night.

–pouring rain
very heavy rain
e.g.
The children’s clothes were soaked after they played out in the pouring rain.
I waited in the pouring rain for the next bus.

–rain cats and dogs
to rain very hard
e.g.
It’s raining cats and dogs. Look at it pour!
I’m not going out in that storm. It’s raining cats and dogs.

-get all wet
completely wet
e.g.
It’s true! The dress got all wet.
You got all wet, Opal.
I missed the bus and had to walk home. What’s more, it was raining and I got all wet.
I fell in and got all wet.

–drench
completely wet
e.g.
The man was drenched to the skin.
We were drenched by the sudden rainstorm.
It was raining and I was drenched when I got home .

–soaking wet
extremely wet with water or another liquid
a way of describing someone whose clothes have gotten wet through and through. Running from the car to the house might get you wet, but walking in a heavy rainstorm for 15 minutes will get you “soaking wet.”
e.g.
She is soaking wet

To learn more, you can check the website down below
http://idioms.thefreedictionary.com/rain