The weather

I´m in Zaragoza, Spain. Today, in this city it is raining heavily. When it rains, I hate to go out of my house because my umbrella never covers me, my shoes take in  water and I  haven't  any gumboots. Thank goodness that today is Saturday and I can stay in my house all day, eating, seeing watching movies and praticising my English.

I hope that in your cities  it isn´t raining and you are able to enyoy this weekend!

Notes - only minor changes.

You need a golf umbrella, they are a lot larger than normal umbrellas and sturdier.

It is raining in a lot of our cities today. We had billiard ball sized hailstones in my home town today.

The weather

I´m from Zaragoza, Spain. Today, in this city, it's is raining a lot of. When it rains, I hate to go out of my house because my the umbrella never covers me, my shoes have get filled with (or use "take in") water and I don't even have haven´t gumboots. 
Thank goodness that today is a Saturday and I can stay in my house all day, eating, watching seeing movies and practicing/practising praticicing my english.

I hope that in your cities it isn´t raining and you are able to enjoy enyoy this weekend too!

My notes :

We usually write that we are from somewhere. We use in when we want to say that we're in a Park or zoo.

So it's better to write it as "I'm from Spain. Today in ..."
OR instead if you want to write in ->
"I live in Zaragoza, Spain. Today in this... "

Though I am in Spain is correct. But if used in a sort of continuation for the second statement. Example :

"I'm in Pune, India. And I work here."
OR  in your case it should be -
"I'm in Zaragoza, Spain and today, in this city, it's raining a lot." or "I'm in Zaragoza, Spain and today, it's raining a lot here."

Though your version seems correct too, I just mentioned it here as what sounds & would be better. Just as a tip. :)

In the last sentence I added too because,

I hope that in your cities it isn´t raining and you are able to enjoy this weekend! - this sentence sort of means I hope it's not raining in your city, and you are able to enjoy the weekend, as I'm unable to because of the rains. This is sort of a hidden meaning.

Adding a too at the end changes the meaning.

I hope that in your cities it isn´t raining and you are able to enjoy this weekend too!

Now it means I'm enjoying the weekend, and hope you enjoy it too! 
 

Still all these, were just minor changes. Your english is very good.

Hope I didn't confuse you more. :-p :-)

I´m in Zaragoza, Spain. Today, in this city is raining a lot of. When it rains, I hate to go out my house because the umbrella never covers me, my shoes have water and I haven´t gumboots. Goodness that today is Saturday and I can stay in my house all day, eating, seeing movies and practicing my English.