В октябре я чаще пью горячий чай и надеваю серый свитер.

Because after в meaning in with a month, Russian uses the prepositional case.

• Dictionary form: октябрь = October
• Prepositional form: октябре

So:

• в октябре = in October
• в январе = in January
• в мае = in May

This is a very common pattern for months and other time expressions.

Чаще means more often. It is the comparative form of часто (often).

• часто = often
• чаще = more often

So я чаще пью горячий чай means I drink hot tea more often.

It usually implies comparison with another time, season, or situation, even if that comparison is not stated directly.

Because чаще is specifically about frequency.

• чаще = more often
• больше = more, a greater amount

So if you are talking about how frequently something happens, чаще is the natural choice.

Compare:

• Я чаще пью чай. = I drink tea more often.
• Я пью больше чая. = I drink more tea.
  This means a larger quantity of tea, not necessarily more frequent occasions.

Пью is the 1st person singular form of пить (to drink), so it matches я (I).

Conjugation of пить in the present tense:

• я пью = I drink
• ты пьёшь = you drink
• он / она пьёт = he / she drinks
• мы пьём = we drink
• вы пьёте = you drink
• они пьют = they drink

So я пью simply means I drink.

Because и is joining two verbs that have the same subject: я.

The sentence structure is:

• я пью
• (я) надеваю

Since both actions belong to the same subject, Russian normally does not use a comma here.

So this is standard:

• В октябре я чаще пью горячий чай и надеваю серый свитер.

A comma would usually be wrong in this simple sentence.

This is a classic Russian learner question.

• надевать / надеть = to put on something
• одевать / одеть = to dress someone

So:

• Я надеваю свитер. = I put on a sweater.
• Я одеваю ребёнка. = I dress the child.

In this sentence, the speaker is putting on a sweater, so надеваю is correct.

A useful memory trick:

• надеть что? = put on what?
• одеть кого? = dress whom?

Because they agree with the nouns they describe.

• горячий чай
• серый свитер

Both чай and свитер are masculine singular inanimate nouns, and here they are direct objects.

In Russian, for inanimate masculine singular nouns, the accusative case looks the same as the nominative case. That is why the forms do not visibly change.

So:

• nominative: горячий чай, серый свитер
• accusative: горячий чай, серый свитер

Even though they are objects, they look unchanged.

Because in Russian, an adjective normally comes before the noun when it directly describes it.

So the standard order is:

• горячий чай = hot tea
• серый свитер = gray sweater

If you put the adjective after the noun, it usually changes the structure or adds emphasis, and it often sounds less neutral.

For basic descriptive phrases, adjective + noun is the default pattern.

It describes a habitual or repeated action, not necessarily something happening at this exact moment.

Russian present tense can be used for:

• things happening now
• regular habits
• general truths

Here, the time phrase в октябре and the adverb чаще make it clear that this is about what the speaker generally does in October.

So the meaning is more like:

• In October, I more often drink hot tea and put on a gray sweater.

That is a seasonal habit or tendency.

Yes, but the meaning changes slightly.

• надеваю свитер = put on a sweater
• ношу свитер = wear a sweater

So:

• В октябре я надеваю серый свитер focuses on the action of putting it on.
• В октябре я ношу серый свитер focuses on wearing it in general.

In English, wear is often more natural in this kind of seasonal statement, so learners sometimes expect ношу. But the Russian sentence with надеваю is still correct if the idea is that in October the speaker starts putting on a sweater more often.

Yes. Russian word order is fairly flexible, although some orders sound more neutral than others.

The given sentence is natural and neutral:

• В октябре я чаще пью горячий чай и надеваю серый свитер.

You could also move parts around for emphasis, for example:

• Я в октябре чаще пью горячий чай и надеваю серый свитер.
• Горячий чай я в октябре пью чаще.

But changing the order changes the emphasis or style. For learners, the original version is a very good standard model.

Yes, it could be omitted, because the verb endings already show the person:

• пью = I drink
• надеваю = I put on

So Russian often leaves out subject pronouns when they are clear from context.

For example:

• В октябре чаще пью горячий чай и надеваю серый свитер.

This is possible and natural in the right context.

However, including я is also completely normal, especially when:

• starting a sentence
• making the subject explicit
• adding a little emphasis or clarity

So both are possible.