huyu ha karada ga hieru node, atatakai otya wo nomimasu.

は marks 冬 as the topic: as for winter or in winter.

So 冬は does not mean winter is doing an action. It sets the scene for the rest of the sentence. In natural English, this often becomes in winter.

• 冬は = as for winter / in winter
• then the speaker says what is true in that context

This is very common with time words and seasons:

• 夏は暑いです。 = In summer, it’s hot.
• 朝はコーヒーを飲みます。 = In the morning, I drink coffee.

Here, が marks 体 as the thing that experiences the change described by 冷える.

• 体が冷える = the body gets cold

Using が is very natural because 冷える is describing what happens to the body.

If you said 体は, it would sound more contrastive or like you are specifically making the body the topic:

• 体は冷えるが、手は冷えない。 = My body gets cold, but my hands do not.

So in this sentence:

• 冬は = topic/setting
• 体が = subject of 冷える

Yes, in this sentence it naturally means my body gets cold.

Japanese often leaves out things that are understood from context, especially:

• I / you / he / she
• my / your / his / her

Since the sentence is about what the speaker does next:

• 温かいお茶を飲みます = I drink warm tea

it is natural to understand 体 as my body.

So Japanese does not need to say:

• 私の体が冷えるので...

unless the speaker wants to be extra explicit.

This is a very common question.

• 冷える is intransitive: something gets cold
• 冷やす is transitive: someone cools something

Examples:

• 体が冷える。 = My body gets cold.
• 飲み物を冷やす。 = I chill a drink.

In your sentence, the body is not actively cooled by the speaker. It simply becomes cold, so 冷える is the correct verb.

寒い means cold in the sense of weather or feeling cold.
冷える means to become cold / to get chilled.

So the nuance is a little different:

• 冬は寒いです。 = Winter is cold.
• 体が冷える。 = My body gets cold / my body gets chilled.

In this sentence, 体が冷える suggests the body physically losing warmth, which connects very naturally to drinking warm tea.

ので means because / since.

• 体が冷えるので、温かいお茶を飲みます。
• Because my body gets cold, I drink warm tea.

Compared with から, ので often sounds:

• a bit softer
• a bit more explanatory
• slightly more formal or gentle

Compare:

• 体が冷えるので、温かいお茶を飲みます。
  = Because my body gets cold, I drink warm tea.
  neutral, explanatory

• 体が冷えるから、温かいお茶を飲みます。
  = Because my body gets cold, I drink warm tea.
  a little more direct/conversational

Both are possible here.

The comma separates the reason part from the main statement:

• 冬は体が冷えるので、 = because in winter my body gets cold,
• 温かいお茶を飲みます。 = I drink warm tea.

Japanese commas are often more flexible than English commas. They are used to make a sentence easier to read, show a pause, or separate clauses clearly.

So the comma here is very natural, but punctuation in Japanese is not always as rigid as in English.

Yes, both are read あたたかい, but they are used a little differently.

A common distinction is:

• 温かい: warm things by temperature, especially things you touch/eat/drink
  
  • 温かいお茶 = warm tea
• 暖かい: warm weather, warm air, warm clothing, a warm room, etc.
  
  • 暖かい日 = a warm day
  • 暖かい部屋 = a warm room

So for tea, 温かい is the normal kanji choice.

The お in お茶 is an honorific/polite prefix, but in many words it has become extremely natural and standard.

So while 茶 exists as a word, in everyday Japanese people usually say:

• お茶 = tea

This does not necessarily sound very formal. It is simply the normal word in many situations.

Other common examples:

• お水 = water
• お酒 = alcohol/sake
• お箸 = chopsticks

Japanese ます-form non-past can express:

• present
• future
• habitual actions

Here, 飲みます means a habitual action:

• I drink warm tea
  or
• I will drink warm tea in that situation

Because the sentence is about a general tendency in winter, English also uses the simple present:

• In winter, I drink warm tea.

So this is not a problem of tense mismatch. It is normal Japanese usage.

を marks the direct object of the verb.

• お茶を飲みます = drink tea
• お茶 is the thing being drunk, so it takes を

This is one of the most basic verb patterns in Japanese:

• コーヒーを飲みます。 = I drink coffee.
• 本を読みます。 = I read a book.
• ご飯を食べます。 = I eat rice / a meal.

The sentence order is natural, but Japanese word order is more flexible than English as long as the particles make the roles clear.

Standard version:

• 冬は体が冷えるので、温かいお茶を飲みます。

You could also say:

• 体が冷えるので、冬は温かいお茶を飲みます。

That still makes sense, though the emphasis changes a little.

Japanese often places the reason before the main action, especially with ので and から.

Yes. Replacing 体 changes what gets cold:

• 手が冷える = my hands get cold
• 足が冷える = my feet get cold
• 体が冷える = my body gets cold / I get chilled

Also, 体が冷える often sounds a little more physical or bodily than simply saying 寒いです. It suggests that the cold affects your body, not just that the weather is cold.

That is why it pairs nicely with a warming action like drinking tea.