O consumo de dados está alto este mês.

O is the masculine singular definite article, meaning the.

It goes with consumo, which is a masculine singular noun: o consumo = the consumption / the usage.

In Portuguese, articles are used more often than in English, so the data usage is high this month naturally becomes o consumo de dados está alto este mês.

Literally, consumo de dados means consumption of data.

In everyday Brazilian Portuguese, this is a common way to talk about internet or mobile data usage. So even though English often prefers data usage, Portuguese commonly uses consumo.

Structure:

• consumo = consumption / usage
• de = of
• dados = data

So:

• consumo de dados = data usage

Portuguese usually connects nouns with de when English might put one noun directly before another.

English:

• data usage
• phone bill
• internet speed

Portuguese often uses:

• consumo de dados
• conta de telefone
• velocidade da internet

So de is a very common linking word here, and consumo de dados is the normal structure.

Dados is the usual Portuguese word for data in this context, and it is normally plural.

Examples:

• gastei muitos dados = I used a lot of data
• meus dados móveis acabaram = my mobile data ran out

Even though English speakers may think of data as singular in everyday use, Portuguese usually treats dados as a plural noun in this meaning.

Portuguese has two main verbs for to be: ser and estar.

Here, está is used because the sentence describes a current, temporary condition:

• O consumo de dados está alto este mês. = The data usage is high this month.

This suggests that the usage is high right now or during this period, not that it is an essential, permanent characteristic.

Compare:

• está alto = is high right now / currently
• é alto = is high by nature / generally / as a fixed characteristic

In this sentence, está is the natural choice because este mês points to a temporary situation.

Because alto agrees with consumo, not with dados.

The noun being described is consumo, and consumo is masculine singular. So the adjective must also be masculine singular:

• o consumo → masculine singular
• alto → masculine singular

If the noun were feminine, you would use alta:

• A conta está alta. = The bill is high.

Here, alto means high in the sense of a large amount.

Portuguese often uses alto/alta with quantities, prices, levels, and costs:

• preço alto = high price
• temperatura alta = high temperature
• consumo alto = high consumption / heavy usage

So está alto does not mean physically tall here. It means the level or amount is high.

Both can exist, but este mês is very natural here.

• este mês = this month
• neste mês = in this month

In many time expressions, Portuguese does not need a preposition where English would use one:

• este mês = this month
• esta semana = this week
• este ano = this year

So O consumo de dados está alto este mês is completely normal.

Using neste mês is possible in some contexts, but it can sound a little more specific or contrastive depending on the sentence.

Yes. Portuguese allows some flexibility in word order.

For example, you could also say:

• Este mês, o consumo de dados está alto.

This version emphasizes this month a bit more.

But the original order:

• O consumo de dados está alto este mês.

is very natural and neutral.

No, but it is one of the most common and natural ways.

Other possibilities include:

• O uso de dados está alto este mês. = Data use is high this month.
• Você está consumindo muitos dados este mês. = You are using a lot of data this month.

Still, consumo de dados is especially common in phone-company, app, and settings language, so it sounds very natural in this kind of sentence.

In most Brazilian accents, está sounds roughly like es-TAH, with the stress on the second syllable.

A few pronunciation notes:

• the e at the start is short
• the tá is the stressed part
• the written accent in á shows the stress

So:

• está = es-TAH

This is the third-person singular form of estar, matching o consumo.

The sentence breaks down like this:

• O consumo de dados = subject
• está = verb
• alto = adjective / subject complement
• este mês = time expression

So the pattern is:

[subject] + [estar] + [adjective] + [time expression]

You can use this same structure in many similar sentences:

• A conta está alta este mês.
• O gasto está baixo hoje.
• A velocidade está lenta ultimamente.

It is a very useful pattern for describing temporary states.