Wij zijn in juli thuis.

Both are possible. Wij and we both mean we.

The difference is mainly about stress and emphasis:

• we is the more common everyday form
• wij is the full form, often used for emphasis, contrast, or slightly more careful speech

So:

• Wij zijn in juli thuis.
• We zijn in juli thuis.

Both are correct. In normal conversation, we is often more natural.

Because the subject is wij = we, and the verb is zijn = to be.

The present tense of zijn is irregular:

• ik ben = I am
• jij bent / u bent = you are
• hij/zij/het is = he/she/it is
• wij zijn = we are
• jullie zijn = you are
• zij zijn = they are

So wij zijn simply means we are.

Because thuis already means at home or home.

So Dutch says:

• Ik ben thuis. = I am at home.
• Wij zijn thuis. = We are at home.

You do not add a separate preposition like at here.

This is different from English, where home and at home are often separate expressions.

A useful contrast:

• thuis = at home
• naar huis = home, toward home

For example:

• Wij zijn thuis. = We are at home.
• Wij gaan naar huis. = We are going home.

Dutch normally uses in with months:

• in juli = in July
• in augustus = in August
• in december = in December

That is the standard way to express a month.

Also, month names in Dutch are normally not capitalized, so it is juli, not Juli, unless it starts the sentence.

Because Dutch normally does not use an article with months in this kind of time expression.

So you say:

• in juli
• in april
• in november

not:

• in de juli

This is similar to English, where you also just say in July, not in the July.

No, they are related but they are not the same word.

• huis is a noun: house / home
• thuis is usually an adverb: at home

Compare:

• Ons huis is groot. = Our house is big.
• Wij zijn thuis. = We are at home.

So you cannot normally replace one with the other:

• correct: Wij zijn thuis.
• not correct: Wij zijn huis.

Yes. In a Dutch main clause, the finite verb usually stays in second position, but other parts can move around for emphasis.

The sentence as given:

• Wij zijn in juli thuis.

This is a very normal order: subject + verb + time + place/state.

You can also say:

• In juli zijn wij thuis.

This puts more focus on in July.

You may also hear:

• We zijn thuis in juli.

That is possible too, but it can sound a bit more marked or context-dependent. The original version is a very safe, neutral choice.

Grammatically, it is present tense, but in Dutch, the present tense is often used for the future when a time expression makes the meaning clear.

So depending on context, this sentence can mean something like:

• We are at home in July.
• We will be at home in July.

Because in juli clearly refers to a time period, Dutch does not need a separate future form here.

Not exactly formal, but it is a bit fuller and sometimes more emphatic than we.

In everyday speech, many people would naturally say:

• We zijn in juli thuis.

Using wij is still completely normal, especially:

• in writing
• when speaking clearly
• when contrasting with someone else

For example:

• Wij zijn in juli thuis, maar zij niet. = We are at home in July, but they are not.

A few helpful points:

• j in Dutch sounds like English y
• so juli begins like YOO-..., not like English JOO-...
• ui in thuis is a famous Dutch vowel sound that has no exact English equivalent

Roughly:

• juli sounds a bit like YOO-lee
• thuis is approximately like th-ouse, but that is only a rough guide

The hardest part is ui. It is better to listen to native audio for that sound, because English does not really have an exact match.

No, not in standard Dutch.

Dutch normally requires the subject to be stated in a sentence like this, so you need:

• Wij zijn in juli thuis.
• We zijn in juli thuis.

Leaving out wij/we would sound incomplete in standard Dutch.

Yes, depending on context, that can be a natural English translation.

Literally, the sentence is built with to be:

• Wij zijn in juli thuis. = We are at home in July.

But in real usage, it can also imply:

• We’re home in July
• We’ll be at home in July
• We stay home in July

The exact English wording depends on what has already been said and what nuance the speaker wants.