I když je venku zima, moje dcera chce jít k řece.

No. Here i když is a set phrase meaning although / even though.

• když on its own usually means when
• i often means also / even

But together, i když functions as a conjunction introducing a contrast:

• I když je venku zima, ... = Although it is cold outside, ...

So i here is not the same as English and.

Because I když je venku zima is a subordinate clause, and Czech normally separates subordinate clauses with a comma.

So the structure is:

• I když je venku zima, = subordinate clause
• moje dcera chce jít k řece. = main clause

This comma is standard and expected in written Czech.

Czech usually does not use a dummy subject like English it in weather expressions.

English says:

• It is cold outside

Czech says more literally:

• Is outside cold

So je venku zima is a normal impersonal expression. Czech does not need a subject here.

Zima can mean two related things:

1. winter
2. cold / feeling of cold

In this sentence, je zima means it is cold.

This is a very common Czech weather expression:

• Je zima. = It’s cold.
• Je teplo. = It’s warm.
• Je horko. = It’s hot.

So here zima is not the season winter, but the condition cold.

Venku means outside / outdoors.

It is an adverb, not a noun, so it does not change for case here.

Examples:

• Jsem venku. = I am outside.
• Je venku zima. = It is cold outside.

You could think of venku as answering the question where?

Both moje dcera and má dcera are correct and mean my daughter.

The difference is mostly stylistic:

• moje is very common in everyday speech
• má can sound a bit shorter, sometimes slightly more literary or formal, though it is also normal in speech

So:

• moje dcera
• má dcera

Both work. In this sentence, moje dcera sounds completely natural.

Because chce means wants, and after want Czech uses an infinitive, just like English.

• chce = wants
• jít = to go

So:

• moje dcera chce jít = my daughter wants to go

This pattern is very common:

• chci jít = I want to go
• chce spát = he/she wants to sleep
• chceme odejít = we want to leave

Because the preposition k always takes the dative case.

The base form is:

• řeka = river

In the dative singular, it becomes:

• řece

So:

• k řece = to/toward the river

This is not motion into the river. It means movement to the area near it / toward it.

A few similar examples:

• k domu = to the house
• k mamince = to mom
• k městu = toward the town

This is an important difference.

• k řece = to the river / toward the river / up to the river
• do řeky = into the river

So in your sentence, jít k řece means going to the riverbank or riverside area, not entering the water.

Compare:

• Jdu k řece. = I’m going to the river.
• Jdu do řeky. = I’m going into the river.

Yes, Czech word order is more flexible than English, but the original order is very natural.

Standard version:

• I když je venku zima, moje dcera chce jít k řece.

You could also hear:

• Moje dcera chce jít k řece, i když je venku zima.

Both are correct. The difference is mainly in emphasis and information flow.

Putting I když... first sets up the contrast immediately. That is a very common choice.

Two pronunciation points often stand out for English speakers:

• dcera begins with dts- roughly: DTS-eh-ra
• ř is the famous Czech sound, something like a rolled or raised r mixed with zh

Approximate pronunciations:

• dcera ≈ DTS-eh-ra
• řece ≈ rzhe-tseh or zhe-tseh as a rough learner approximation

A few helpful notes:

• c in Czech is always like ts
• e is usually like eh
• ř is difficult, and learners often approximate it at first; that is normal

So even if your ř is not perfect yet, Czech speakers will usually still understand řece from context.