Loše vreme je problem.

Because vreme is a neuter singular noun, and the adjective has to agree with it.

• masculine: loš
• feminine: loša
• neuter: loše

So:

• loš čovek = a bad man
• loša knjiga = a bad book
• loše vreme = bad weather

In this sentence, loše matches vreme.

Yes. Vreme is neuter singular.

A very common clue in Serbian is that nouns ending in -e or -o are often neuter, although there are exceptions. Since vreme is neuter, any adjective describing it must also be in the neuter form, which is why you get loše vreme.

Je is the 3rd person singular present tense of biti = to be.

So:

• ja sam = I am
• ti si = you are
• on/ona/ono je = he/she/it is

In Loše vreme je problem, je means is.

Because Serbian does not use articles like English a/an/the.

So a sentence like Loše vreme je problem can mean:

• Bad weather is a problem
• The bad weather is a problem

Which one is meant depends on the context.

This is very normal in Serbian, and learners have to get used to understanding definiteness from the situation instead of from an article.

Both vreme and problem are in the nominative singular here.

This is because the sentence is an equational sentence with to be:

• Loše vreme = the subject
• je problem = what it is identified as

Serbian often uses the nominative on both sides in simple present-tense sentences like this.

Yes. Problem is a normal Serbian noun, borrowed long ago from international vocabulary, and it is masculine.

So you can say:

• To je problem. = That is a problem.
• Imam problem. = I have a problem.
• Veliki problem. = A big problem.

In this sentence, problem is just the predicate noun: Bad weather is a problem.

Yes. Vreme can mean both time and weather, depending on context.

For example:

• Nemam vremena. = I don't have time.
• Lepo je vreme. = The weather is nice.

In Loše vreme je problem, the adjective loše and the overall meaning strongly suggest weather, not time. But it is useful to know that vreme is one of those Serbian words with multiple meanings.

Yes. Serbian word order is more flexible than English word order.

The neutral version is:

• Loše vreme je problem.

But you could also hear:

• Problem je loše vreme.

That version puts more focus on problem first, almost like The problem is bad weather.

So the words can move around, but the emphasis changes.

A simple pronunciation guide is:

LO-she VRE-me ye PRO-blem

A few useful notes:

• š sounds like sh in shoe
• j sounds like English y in yes
• e is usually a clear eh sound, not a silent letter

So:

• Loše ≈ LO-she
• vreme ≈ VRE-me
• je ≈ ye
• problem ≈ PRO-blem

Yes, in some regional standards.

• vreme is the usual Ekavian form
• vrijeme is the usual Ijekavian form

So both are correct depending on the variety of Serbian/Bosnian/Croatian/Montenegrin you are learning:

• Loše vreme je problem.
• Loše vrijeme je problem.

The grammar is the same; only the form of the word changes.

Normally, in standard Serbian, no. In the present tense, Serbian usually keeps the verb to be in sentences like this.

So you say:

• Loše vreme je problem.

not normally:

• Loše vreme problem.

Omitting je would sound ungrammatical in standard Serbian, except in very special styles such as headlines, notes, or highly compressed informal speech.