A Night with Typhoons

One of the typhoons is 20 km away from the coast now.

Its moving speed is 10 km/h, it means thating it will hit the city in 2 hours.

The small (city/town/village?) where I live is near the circleenter of the whole gale, maybegale. Perhaps in half an hour later, it will in the circleenter.

Gale is not incorrect but it is not often use, using storm would sound more natural, but I know you probably want to try new words so its fine.

Center sounds more natural than circle here. Another common way to describe it is to use "eye" as in "eye of the storm".

The wind is blowing, w hard. When it goes through the trees, the leaves are rustlinge and wavinge about.

SomeAt times, when there is a strong appearsgust, the rains are runningdrops fall fastly like a hurry man and thensomeone in a hurry who then suddenly disappears.

I'm not sure if this is what you meant, but I tried to fix your grammatical errors.

Or the raindrops just look like the fireworks, "blooming flashily, then withering away swiftly.

"(a sentence I quoted from a dictionary)

The temperarture ofin my room is now 27.4 degrees now, which is, the lowest it's been this summer.

It is so cool and comfortable,. I hate the hot weather deeply.

A good reminder is if the sentence after a comma can be a stand-alone sentence, then I would just use a period.

A Night with a Typhoon

"A Night with a Typhoon" or "A Night with The Typhoon" would sound more natural.

It is moving at a speed isof 10 km/h, i. That means that it will hit the city in 2 hours.

Your sentence makes sense, but "moving speed" sounds unnatural because that phrase is uncommon. You can also write "It is traveling at a speed of 10 km/h". Writing "kilometers per hour" is okay too.
Since the sentences are related to each other, you can join them together using a semicolon (;) too.

The small town where I live is near the circle of the whole gale, m. Maybe in half an hour later, it will inbe inside the circle.

You seem to be missing some words. You have to add "small town" or "small village" or "small city".
Remember to write "will be". "will" means future tense, but you need the verb too.
"Eye of the typhoon" or "eye of the storm" is commonly used to describe the middle circle of a typhoon or tornado.

The wind is blowing,; when it goes through the tree, the leaves are rustling and waving.

You can use a period here too. When you use a comma, the sentence sounds too long.
You can also write "when it goes through the trees, the leaves rustle and wave". It is better to use "trees" unless you are specifically talking about a single tree.

Sometimes, when there is a strong storm appears, the rains are is running fastquickly like a hurryied man and then disappears.

I am not sure what "when there is a strong appears" means, I think you are missing a word. Maybe you meant to write "when a strong storm appears" or "when there is a strong typhoon".
"Fastly" is not a word. You need to use "quickly".
I am also not sure what you mean by "a hurry man". You could write something like "a hurried man" or "a man in a hurry" or "a hurrying man" to mean that he is in a rush.
It should be "the rain is". It is a little strange in English, where we do not use "rains" even though there is a lot of rain.
It would be more natural to write "when a strong storm appears, the rain runs quickly", because "is running" is only used when something is happening in the present tense. When you write "Sometimes," it is about something that has happened before, and not talking about the present tense even if there is a storm now.
I hope this explanation is not confusing !!

Or, the rains just looks like the fireworks, "blooming flashily, withering away swiftly.

Be careful starting sentences with "or", "and", "but", because sometimes people forget that they need another sentence before in order to make sense. However, it is used correctly here.
This is a good example from a dictionary.

"(a sentence I quoted from a dictionary)

The temperarture of my room is 27.4 degrees now, which is the lowest it has been this summer.

You could also write "the temperature in my room".
It could also be helpful to write "Celsius" after degrees since there are a lot of American readers that only know Fahrenheit.
"the lowest in this summer" sounds a little unnatural. You can also use "the coolest it has been" or "the coldest it has been".
When you use "it has been", it's like you are talking about all the time in the past until this point in time. Another way to say this is "The temperature of my room is 27.4 degrees now, which is the coldest temperature up until this point during this summer". Basically, you are comparing how it was to how it is now. Before, it was warmer, so it had been warmer up until the present, where it has warmed up.
I hope this explanation makes sense to you!

It is so cool and comfortable,. I hate the hot weather deeply.

It would be better to use a period (.) or semicolon (;).