Hırkanızı unutmayın; sabah güneşli olsa bile akşam serin olabilir.

It is:

• hırka = cardigan
• -nız = your for you all or you in a polite/formal sense
• -ı = the accusative ending, used here because it is the definite direct object of unutmayın

So hırkanızı means your cardigan as the thing being forgotten.

Because it is the negative imperative form of unutmak = to forget.

Breakdown:

• unut- = forget
• -ma- = negation
• -yın = imperative ending for you all or polite you

So unutmayın means don’t forget.

A singular informal version would be unutma.

It can be either:

• one person politely
• more than one person

Turkish uses the same kind of endings for both.

That is why both:

• hırkanızı = your cardigan
• unutmayın = don’t forget

have the -nız / -yın type of endings.

Here sabah means in the morning.

Turkish often uses time words by themselves without a preposition. So:

• sabah = in the morning
• akşam = in the evening

English needs in here, but Turkish usually does not.

güneşli means sunny.

It comes from:

• güneş = sun
• -li = with, having, characterized by

So the literal idea is with sun.

This is a very common pattern in Turkish adjectives.

For example:

• sisli = foggy
• rüzgarlı = windy

olsa comes from olmak = to be / to become.

Here it is the conditional form, meaning something like if it is.

So:

• güneşli olsa = if it is sunny

In Turkish, when a noun or adjective appears in a clause like if... or even if..., ol- is often used to carry that meaning.

It means even if it is or even though it may be.

Breakdown:

• -sa / -se = if
• bile = even

So:

• güneşli olsa bile = even if it is sunny

This structure shows contrast: the first situation is true, but the second situation can still happen.

Yes. Those are also possible.

For example:

• güneşli olsa da
• güneşliyse bile

Both are close in meaning to güneşli olsa bile.

For a learner, the important point is that Turkish has several natural ways to say even if / even though.

Very roughly, it is:

• akşam = in the evening
• serin = cool
• olabilir = may be / can be

So the structure is basically in the evening, it may be cool.

It comes from olmak plus the possibility suffix:

• ol- = be
• -abil- = can, may, be possible
• -ir = a common present/aorist ending

So olabilir means:

• it may be
• it can be
• it could be

In this sentence, it expresses possibility, not certainty.

Because Turkish often leaves the subject unstated when it is obvious from context.

English says:

• it may be cool

But Turkish can simply say:

• serin olabilir

Weather expressions especially often work this way.

No.

• serin = cool, mildly chilly
• soğuk = cold

So this sentence suggests a cooler evening, not necessarily a very cold one.

That word order is very natural in Turkish.

Turkish often puts the background condition or contrast first, then gives the main point after it.

So:

• sabah güneşli olsa bile = sets up the contrast
• akşam serin olabilir = gives the important result

English can do this too with Even if..., but Turkish uses this pattern very often.

Because Turkish uses vowel harmony.

Suffix vowels often change to match the vowels in the word before them.

For example:

• unutmak → unutmayın uses -ma
• hırka → hırkanızı uses -ı and -nız

This is a normal part of Turkish grammar. The suffix is the same basic suffix, but its vowel changes depending on the word it attaches to.

The semicolon connects two closely related ideas:

• Hırkanızı unutmayın = the advice
• sabah güneşli olsa bile akşam serin olabilir = the reason

So it works a bit like saying:

• Don’t forget your cardigan; after all, even if the morning is sunny, the evening may be cool.

It shows a strong connection without making it two completely separate sentences.