Όταν έχει καύσωνα, φοράω σορτς στο σπίτι, αλλά παίρνω μαζί μου και ένα λεπτό πουλόβερ για το κλιματιστικό.

That is a very normal Greek way to talk about weather. Greek often uses έχει (it has / there is) with weather nouns:

• έχει ζέστη = it’s hot
• έχει κρύο = it’s cold
• έχει καύσωνα = there is a heatwave / it’s extremely hot

So Όταν έχει καύσωνα means When there’s a heatwave or more naturally When it’s extremely hot.

Also note that the dictionary form is ο καύσωνας. After έχει, it appears in the accusative:

• ο καύσωνας → τον καύσωνα
• in this expression: έχει καύσωνα

Όταν means when. It introduces a time clause.

In this sentence, both verbs are in the present tense:

• Όταν έχει καύσωνα...
• φοράω...
• παίρνω...

This present tense is being used for a habitual situation: whenever it’s extremely hot, I do these things.

So the sentence is not about one specific moment, but about a general routine.

Because Greek usually does not need subject pronouns. The verb ending already tells you the subject.

• φοράω = I wear
• παίρνω = I take

If you added εγώ, it would sound more emphatic:

• Εγώ φοράω... = I wear...

But in ordinary sentences, Greek usually leaves the subject pronoun out unless it is needed for emphasis, contrast, or clarity.

Yes, both are correct.

For many verbs in Modern Greek, there are two common present-tense forms:

• φοράω
• φορώ

Both mean I wear.

Similarly:

• αγαπάω / αγαπώ
• μιλάω / μιλώ

In everyday spoken Greek, the -άω forms are very common, so φοράω sounds completely natural.

Σορτς is a loanword from English (shorts). In Modern Greek, many borrowed clothing words are indeclinable, which means they do not change form.

So you may see:

• το σορτς
• τα σορτς

In this sentence, there is no article, just:

• φοράω σορτς = I wear shorts

That is perfectly natural. Greek often omits the article with clothing items in this kind of general statement.

Στο σπίτι literally means in/to the house/home and very often means at home.

Here:

• φοράω σορτς στο σπίτι = I wear shorts at home

It is formed from:

• σε = in / at / to
• το σπίτι = the house / the home

These combine into:

• σε το σπίτι → στο σπίτι

So στο is just the contracted form of σε το.

Σπίτι by itself means house or home as a noun.

Examples:

• Το σπίτι είναι μεγάλο. = The house is big.

Στο σπίτι adds the preposition σε:

• στο σπίτι = at home / in the house

So in the sentence, στο σπίτι tells you where the action happens.

Μαζί μου means with me.

• μαζί = together / with
• μου = me / my, here meaning with me

So:

• παίρνω μαζί μου ένα πουλόβερ = I take a sweater with me

This is a very common Greek pattern:

• παίρνω μαζί μου = I take with me
• φέρνω μαζί μου = I bring with me
• έχω μαζί μου = I have with me

English often uses just take, but Greek very naturally adds μαζί μου to make the idea explicit.

Here και means also / too.

So:

• παίρνω μαζί μου και ένα λεπτό πουλόβερ = I also take a light sweater with me

The idea is:

• I wear shorts at home,
• but I also take a light sweater

This και is not simply and joining two nouns. It adds the sense of in addition.

Yes, λεπτός / λεπτή / λεπτό can mean different things depending on context.

Common meanings include:

• thin
• slim
• fine
• lightweight for clothing
• and as a noun, λεπτό can also mean minute

Here it is an adjective describing πουλόβερ, so it means thin/lightweight:

• ένα λεπτό πουλόβερ = a light sweater

So this is not the noun minute here.

Yes. Το πουλόβερ is a neuter noun in Greek.

That is why both the article and adjective are neuter singular:

• ένα = a/an, neuter singular
• λεπτό = thin/light, neuter singular
• πουλόβερ = sweater, neuter singular

So they agree with each other:

• ένα λεπτό πουλόβερ

Πουλόβερ is also a loanword, from pullover. In Modern Greek it is very common and normally treated as a neuter noun:

• το πουλόβερ
• ένα πουλόβερ

In everyday use, it often stays the same in form, especially in the singular. Loanwords in Greek often behave this way.

In this sentence, it means something like:

• for the air conditioning
• because of the A/C
• for when the air conditioning is on

Greek για is very flexible. Here it expresses the reason or purpose for bringing the sweater. The idea is:

Even if it’s very hot outside or at home, indoor air conditioning can be cold, so I bring a light sweater for that.

Also, το κλιματιστικό can mean:

• the air conditioner as the machine
• or, in context, the air conditioning / A/C

So the most natural English understanding here is for the A/C.

Because Όταν έχει καύσωνα is an introductory subordinate clause.

Greek, like English, often puts a comma after an opening when clause:

• Όταν έχει καύσωνα, φοράω σορτς...

This helps separate the time clause from the main clause.

It describes a general habit.

The present tense here has a habitual meaning:

• Όταν έχει καύσωνα, φοράω... αλλά παίρνω...

This means:

• Whenever there’s a heatwave, I wear... but I take...

If Greek wanted to describe one specific past event, it would use different tenses.

Greek word order is more flexible than English word order because verb endings and case forms carry a lot of grammatical information.

The sentence is arranged very naturally in Greek:

• Όταν έχει καύσωνα,
• φοράω σορτς στο σπίτι,
• αλλά παίρνω μαζί μου και ένα λεπτό πουλόβερ
• για το κλιματιστικό.

A very literal English version would be:

• When there is a heatwave, I wear shorts at home, but I take with me also a light sweater for the A/C.

That sounds awkward in English, but it is normal in Greek.

You may hear κάνει καύσωνα, and many speakers would understand it, but έχει καύσωνα is the more standard and natural expression.

Greek weather expressions often follow established patterns, and έχει καύσωνα is one of them.

Similarly:

• έχει ζέστη
• έχει κρύο

So for a learner, έχει καύσωνα is the safest choice.

Great question. Μου can mean different things depending on context.

It can mean:

• my: το βιβλίο μου = my book
• to me / for me / me in certain constructions: δώσε μου = give me
• after μαζί: μαζί μου = with me

So μου is a weak pronoun form that can serve several functions. In μαζί μου, it is best understood as with me.

Yes, if the context already makes it clear.

For example:

• Όταν έχει καύσωνα, φοράω σορτς...

already makes sense.

But στο σπίτι adds useful information: the speaker is specifically talking about what they wear at home. That helps contrast with the second part, where they take a sweater along for air-conditioned places.

It has three main parts:

1. Όταν έχει καύσωνα
   = a time clause: when there’s a heatwave

2. φοράω σορτς στο σπίτι
   = first main action: I wear shorts at home

3. αλλά παίρνω μαζί μου και ένα λεπτό πουλόβερ για το κλιματιστικό
   = contrasting action: but I also take a light sweater with me for the A/C

So the logic is:

• hot weather → shorts at home
• but air conditioning → bring a light sweater too

It sounds very natural. The vocabulary and structure are everyday Modern Greek:

• όταν έχει καύσωνα = common weather phrasing
• φοράω σορτς = natural casual clothing phrase
• παίρνω μαζί μου = very common
• ένα λεπτό πουλόβερ = idiomatic
• για το κλιματιστικό = very understandable and natural in context

A Greek speaker would have no trouble with it.