Con tanto viento, prefiero llevar el pelo en moño.

Both are possible, but con tanto viento is very natural and expressive. It means with so much wind.

• mucho viento = a lot of wind
• tanto viento = so much wind

So tanto adds a stronger sense of degree. It often sounds a bit more emphatic.

Examples:

• Con mucho frío, no salgo. = When it’s very cold / With a lot of cold, I don’t go out.
• Con tanto ruido, no puedo concentrarme. = With so much noise, I can’t concentrate.

In this sentence, con tanto viento sets the situation: because it’s very windy, the speaker prefers a certain hairstyle.

In Spanish, weather and general conditions are often expressed with a singular noun, even when English might think in a more general or plural way.

So:

• hay viento = it’s windy
• hace viento = it’s windy
• con mucho viento = with a lot of wind

Using vientos would usually sound unusual here unless you were talking about different kinds of winds, winds from different directions, or something poetic/technical.

Prefiero llevar... means I prefer to wear/have...

The speaker is not simply stating what they are doing right now. They are saying what they choose or like to do in that situation.

Compare:

• Llevo el pelo en moño. = I wear my hair in a bun. / My hair is in a bun.
• Prefiero llevar el pelo en moño. = I prefer to wear my hair in a bun.

So prefiero adds the idea of personal preference, especially because of the wind.

Here llevar means to wear or to have in a certain style.

Spanish often uses llevar for clothes, accessories, and also hairstyles.

Examples:

• Lleva gafas. = She/He wears glasses.
• Lleva sombrero. = She/He is wearing a hat.
• Lleva el pelo corto. = She/He wears their hair short.
• Llevar el pelo en moño = to wear your hair in a bun

So llevar el pelo en moño is a very natural way to talk about hairstyle.

Spanish often uses the definite article (el, la, los, las) instead of a possessive (mi, tu, su) when it is already obvious whose body part, clothing, or personal item is being discussed.

Since the subject is yo in prefiero, it is already clear that el pelo means my hair.

This is very common in Spanish:

• Me duele la cabeza. = My head hurts.
  Literally: The head hurts me.
• Me lavo las manos. = I wash my hands.
  Literally: I wash the hands to myself.
• Prefiero llevar el pelo corto. = I prefer to wear my hair short.

Using mi pelo is not impossible, but here it is less natural unless you want extra emphasis.

En moño is the standard way to describe the hairstyle: in a bun.

Spanish often uses llevar + noun + en + style/form:

• llevar el pelo en coleta = to wear your hair in a ponytail
• llevar el pelo en trenzas = to wear your hair in braids
• llevar el pelo en moño = to wear your hair in a bun

Con moño usually means with a bun, but it does not sound as idiomatic in this structure when talking about hairstyle. In many contexts, con would suggest accompaniment or an added feature rather than the standard hairstyle pattern.

So llevar el pelo en moño is the more natural expression.

Because en moño works almost like a fixed expression describing hairstyle.

When Spanish describes how something is worn or arranged, it often omits the article:

• llevar el pelo suelto = to wear your hair loose
• llevar el pelo en coleta = to wear your hair in a ponytail
• llevar el pelo en moño = to wear your hair in a bun

You may sometimes hear en un moño, but it sounds more specific, as if focusing on one particular bun arrangement. The article-free version is the usual general hairstyle description.

In this sentence, moño means a hair bun.

In Spain, moño is the normal word for this hairstyle. It refers to hair gathered and twisted into a bun, usually at the back or top of the head.

Be aware that some words for hairstyles vary across the Spanish-speaking world, but moño is perfectly standard in Spain for bun.

They are similar, but not always identical in tone.

• pelo is very common in everyday speech
• cabello can sound a bit more formal, descriptive, or stylistically careful

In Spain, pelo is extremely normal in everyday conversation:

• Tengo el pelo largo.
• Me corto el pelo.
• Llevo el pelo en moño.

You could say llevar el cabello en moño, but it sounds less everyday and more formal or literary.

Yes, that is also natural, but it means something slightly different.

• Prefiero llevar el pelo en moño = I prefer to wear my hair in a bun
• Me hago un moño = I put my hair up in a bun / I make myself a bun

So:

• llevar el pelo en moño focuses on the hairstyle as a state or choice
• hacerse un moño focuses on the action of putting the hair up

Both are common and natural.

The sentence begins with Con tanto viento to give the reason or context first: With so much wind...

That order is very natural in Spanish, especially when setting the scene before the main statement.

You could also say:

• Prefiero llevar el pelo en moño con tanto viento.

That is understandable, but the original order sounds smoother and more natural because it introduces the condition first.

So the structure is:

• context/reason
  • main clause

Very common in Spanish:

• Con este calor, no salgo.
• Con tanta gente, me agobio.
• Con tanto viento, prefiero llevar el pelo en moño.

The original sentence is already completely natural and neutral.

A bit more casual:

• Con este viento, prefiero hacerme un moño.
• Con tanto viento, mejor me hago un moño.

A bit more formal or polished:

• Con tanto viento, prefiero llevar el cabello recogido en un moño.

Notes:

• este viento = this wind / this windy weather
• mejor me hago un moño = I’d better put my hair in a bun
• cabello recogido = hair tied up / gathered up

But for everyday standard Spanish in Spain, the original sentence sounds perfectly good.