Αν έχει πάλι χαλάζι και παγωνιά αύριο, δεν θα πάω με το αυτοκίνητο.

Αν means if and introduces a condition.

So the structure is:

• Αν ... , ... = If ..., ...

In this sentence:

• Αν έχει πάλι χαλάζι και παγωνιά αύριο = If there is hail and frost again tomorrow
• δεν θα πάω με το αυτοκίνητο = I won’t go by car

Greek uses αν very commonly for real or possible conditions like English if.

Yes, έχει literally means has, but Greek often uses έχει impersonally for weather or conditions, in a way similar to English there is / there will be.

So here:

• έχει χαλάζι = there is hail / it is hailing with hail
• έχει παγωνιά = there is frost / it is freezing

This is a very natural Greek way to talk about weather conditions.
It does not mean that some person has hail or frost.

• χαλάζι = hail
• παγωνιά = frost, freezing weather, or severe cold

A learner should notice that παγωνιά is not just any cold weather. It suggests a real freeze or icy conditions.

So the sentence is talking about bad wintery weather:

• hail
• freezing/frosty conditions

πάλι usually means again.

In this sentence, it suggests that this bad weather has happened before or has been happening repeatedly:

• Αν έχει πάλι χαλάζι... = If there is hail again...

Depending on context, it can also sound like once again or yet again.

αύριο means tomorrow.

Greek word order is more flexible than English, so αύριο does not have to come right after αν. It can appear later in the clause and still clearly modify the whole weather situation.

So:

• Αν έχει πάλι χαλάζι και παγωνιά αύριο
  means
• If there is hail and frost again tomorrow

A more English-like order would be possible too, but the original Greek sounds natural.

δεν θα πάω means I will not go.

• δεν = not
• θα = future marker
• πάω = go

So together:

• δεν θα πάω = I won’t go

If you said δεν πάω, that usually means I’m not going / I don’t go, depending on context.
The sentence is talking about a future decision based on a condition, so δεν θα πάω is the right form.

Greek often uses the perfective form after θα when talking about a single future action.

• πάω is the form commonly used for a single act of going
• πηγαίνω is more associated with the imperfective idea: ongoing, repeated, habitual, or general going

So:

• θα πάω = I will go
• θα πηγαίνω would mean something more like I will be going / I will go regularly

Here the speaker means one future action, so θα πάω is the natural choice.

Greek often leaves out subject pronouns because the verb ending already shows the person.

• πάω = I go / I will go in this context

So δεν θα πάω already means I won’t go.

You could add εγώ for emphasis:

• εγώ δεν θα πάω = I won’t go / I’m not going

But without emphasis, Greek usually omits it.

με το αυτοκίνητο means by car.

Literally it is with the car, but in natural English we usually say by car when talking about transport.

So:

• πάω με το αυτοκίνητο = I go by car

This is a very common Greek pattern:

• με το λεωφορείο = by bus
• με το τρένο = by train
• με το αεροπλάνο = by plane

In this sentence, it means by car, meaning the car is the means of transport.

If you want to emphasize location, like in the car, Greek often uses:

• στο αυτοκίνητο = in the car

So compare:

• Πάω με το αυτοκίνητο = I’m going by car
• Είμαι στο αυτοκίνητο = I’m in the car

That is an important distinction for learners.

The comma separates the if-clause from the main clause.

So the sentence has two parts:

1. Αν έχει πάλι χαλάζι και παγωνιά αύριο
2. δεν θα πάω με το αυτοκίνητο

This is similar to English:

• If it hails again tomorrow, I won’t go by car.

In Greek, it is normal to put a comma after the conditional clause when it comes first.

It expresses a real, possible future condition.

The speaker is not talking about an impossible situation or a purely imaginary one. They mean:

• if tomorrow’s weather turns bad again, then they will not go by car

This is a very common everyday use of αν + present-form verb in Greek to talk about future possibilities.

Not very naturally. A word-for-word version would be something like:

• If it has again hail and frost tomorrow, I will not go with the car.

That is understandable, but not natural English.

A natural English translation would be:

• If there’s hail and frost again tomorrow, I won’t go by car.
• or If it hails and there’s frost again tomorrow, I won’t go by car.

This is a good example of why Greek weather expressions often need to be translated by meaning, not word for word.