Hoy llevo un jersey azul y una gorra porque hace fresco por la mañana.

In Spanish, llevar often means to wear when talking about clothes or accessories.

So:

• Llevo un jersey azul = I’m wearing a blue sweater
• Llevo una gorra = I’m wearing a cap

This is very common in everyday Spanish. English learners sometimes expect a verb like to wear, but Spanish usually uses llevar here.

It can also mean other things in other contexts, such as:

• llevar una mochila = to carry/wear a backpack
• llevar tres años aquí = to have been here for three years

So the exact meaning depends on context.

Spanish often leaves out subject pronouns when they are already clear from the verb form.

• llevo already means I wear / I’m wearing
• so yo llevo is possible, but yo is not necessary

This is called subject pronoun omission. Spanish does it much more than English.

You might include yo for emphasis or contrast:

• Yo llevo un jersey azul, pero él lleva una chaqueta.
  I’m wearing a blue sweater, but he’s wearing a jacket.

Llevo is the present tense of llevar.

Here, the present tense is used to describe what the speaker is wearing today / right now / in the current situation.

Spanish often uses the simple present where English might use either:

• I wear
• I’m wearing

So Hoy llevo un jersey azul can naturally mean Today I’m wearing a blue sweater.

In Spanish, adjectives usually come after the noun.

So:

• un jersey azul = a blue sweater
• una gorra roja = a red cap

This is the normal word order. English speakers often want to put the adjective first, but in Spanish the usual pattern is:

• noun + adjective

There are some exceptions in Spanish, but with colors the adjective normally goes after the noun.

In Spain, jersey usually means sweater, jumper, or pullover.

So here:

• un jersey azul = a blue sweater / jumper

This is a good example of a word that looks familiar to an English speaker but does not mean exactly the same thing as English jersey in every context.

In Spain:

• jersey = sweater/jumper
• a sports jersey is more often camiseta

Because Spanish nouns have grammatical gender.

• jersey is masculine → un jersey
• gorra is feminine → una gorra

The article has to match the gender of the noun:

• un for masculine singular nouns
• una for feminine singular nouns

This does not necessarily mean the object itself is masculine or feminine in any logical sense. It is just part of Spanish grammar.

Some Spanish adjectives change form for gender, but azul does not.

So you say:

• un jersey azul
• una gorra azul

The adjective still has to agree in number, though:

• un jersey azul
• dos jerseys azules

So azul does not change for masculine/feminine, but it does change in the plural: azules.

Porque means because.

It introduces the reason:

• Hoy llevo un jersey azul y una gorra porque hace fresco por la mañana.
  Today I’m wearing a blue sweater and a cap because it’s cool in the morning.

English speakers often confuse:

• porque = because
• por qué = why

Examples:

• Lo hago porque quiero. = I do it because I want to.
• ¿Por qué lo haces? = Why do you do it?

For weather expressions, Spanish very often uses hacer.

So:

• hace calor = it’s hot
• hace frío = it’s cold
• hace fresco = it’s cool / it’s a bit chilly

This is just the normal weather pattern in Spanish. English uses it is, but Spanish often uses hacer in these cases.

So hace fresco is the natural way to say that the weather feels cool.

Here, fresco means cool or slightly chilly, not very cold.

So hace fresco suggests mild cool weather, especially in the morning or evening.

It is softer than:

• hace frío = it’s cold

Also, learners should be careful because fresco can have other meanings depending on context, such as fresh, but in weather expressions hace fresco means it’s cool.

Por la mañana means in the morning.

This is a very common Spanish time expression:

• por la mañana = in the morning
• por la tarde = in the afternoon / evening
• por la noche = at night / in the evening

In Spain, por la mañana is the standard way to say in the morning.

English speakers sometimes expect en la mañana, and although that can appear in some varieties of Spanish, por la mañana is the usual choice, especially in Spain.

Hoy means today.

Putting it at the beginning helps set the time frame right away:

• Hoy llevo un jersey azul... = Today I’m wearing a blue sweater...

Spanish is fairly flexible with word order, so you could also hear:

• Llevo hoy un jersey azul...

But Hoy at the beginning sounds very natural and is probably the most straightforward option.

Grammatically, estoy llevando exists, but it would sound unnatural here.

For clothes, Spanish normally uses the simple present:

• Llevo un jersey azul = natural
• Estoy llevando un jersey azul = unusual in this context

English uses I’m wearing, but Spanish does not normally need a progressive form for that idea.

So for what someone has on, llevo / lleva / llevas, etc. is the normal choice.

Spanish usually uses an article with singular countable nouns in this kind of sentence.

So:

• un jersey
• una gorra

This works like English a sweater and a cap.

You normally would not drop the articles here. Saying just llevo jersey azul y gorra would sound incomplete or unnatural in standard Spanish.

Sometimes in a very general sense, yes, but gorra is more specifically a cap, usually one with a visor.

So:

• gorra = cap
• sombrero = hat
• gorro = often beanie / woolly hat / knitted cap, depending on context

So in this sentence, cap is the best translation for gorra.