Сегодня мне не до прогулок: у меня высокая температура.

Literally, мне не до прогулок means something like to me, it is not up to walks or walks are not for me right now. But this is an idiomatic Russian expression.

не до + genitive is used when someone is not in the mood for, not in a position for, or has no time/energy for something.

So in natural English, мне не до прогулок means:

• I don’t feel like going for walks
• I’m in no condition for walks
• It’s not the time for walks for me

It often suggests that something more important or more serious is preventing the activity.

Because the expression не до takes the person in the dative case, not the nominative.

So:

• я = I
• мне = to me / for me

In this structure, Russian does not say я не до.... It says мне не до..., because the idea is closer to for me, it’s not the time/occasion/state for...

Compare:

• Мне холодно = I am cold
• Мне грустно = I am sad
• Мне не до шуток = I’m not in the mood for jokes

Because не до requires the genitive case.

The noun прогулка becomes прогулок in the genitive plural.

Why plural? Russian often uses the plural here when talking about an activity in a general sense:

• не до шуток = not in the mood for jokes
• не до разговоров = not up for conversations
• не до прогулок = not up for walks / walking

Singular is sometimes possible in other contexts, but here the plural sounds natural because it refers to the activity generally, not one specific walk.

не до is a fixed expression. It is not just the normal negative не plus the preposition до in a literal spatial sense.

In this idiom, не до + genitive means:

• not the right time for something
• not in the right condition for something
• not able or willing to deal with something

Common examples:

• Мне сейчас не до смеха. = I don’t feel like laughing right now.
• Ему не до сна. = He’s in no state to sleep / sleep is the last thing on his mind.
• Нам не до шуток. = We’re not in the mood for jokes.

So learners should remember it as a set pattern: кому? + не до + чего?

It is flexible. Сегодня means today, and Russian word order is relatively free.

These are all possible:

• Сегодня мне не до прогулок.
• Мне сегодня не до прогулок.
• Мне не до прогулок сегодня.

The most natural version here is probably Сегодня мне не до прогулок, because it sets the time first: Today, I’m not up for walks.

Changing the position changes emphasis slightly:

• Сегодня first emphasizes today
• мне earlier can emphasize for me
• putting сегодня later can sound more contrastive

The colon shows that the second part explains the reason for the first part.

So:

• Сегодня мне не до прогулок = Today I’m not up for walks
• у меня высокая температура = I have a high fever

Together, the second clause explains the first: Today I’m not up for walks: I have a high fever.

In English, this could also be written with because:

• Today I’m not up for walks because I have a high fever.

Russian often uses a colon in this kind of explanatory relationship.

Literally, it means at me there is a high temperature.

Russian often uses у + genitive to express possession or a state someone has.

So:

• у меня = at me / I have
• высокая температура = high temperature

Natural English:

• I have a high temperature
• I have a fever

This is a very common Russian pattern:

• У меня машина. = I have a car.
• У меня болит голова. = My head hurts / I have a headache.
• У меня температура. = I have a temperature / fever.

Both are possible, but they mean slightly different things.

• У меня температура = I have a temperature / I have a fever
• У меня высокая температура = I have a high temperature / a high fever

Adding высокая makes it more specific and stronger. It suggests the fever is significant enough to explain why the person does not feel like walking.

Because it agrees with температура, which is a feminine noun in Russian.

Agreement rules:

• masculine noun → masculine adjective
• feminine noun → feminine adjective
• neuter noun → neuter adjective
• plural noun → plural adjective

So:

• высокая температура = feminine + feminine
• высокий уровень = masculine + masculine
• высокое давление = neuter + neuter

Yes, you could, but it is not exactly the same in tone.

• У меня высокая температура is neutral and medically clear.
• У меня жар means I have a fever or I’m feverish, and can sound a bit more subjective or physical.

Both are common, but высокая температура is especially natural when explaining illness in a straightforward way.

In the present tense, Russian often omits the verb to be.

So instead of saying something like у меня есть высокая температура or мне есть не до прогулок, Russian simply leaves the present-tense is/am/are unspoken.

This is normal:

• Я студент. = I am a student.
• Она дома. = She is at home.
• У меня температура. = I have a fever.

So the sentence is complete without a present-tense verb.

Not exactly. That translation is possible in some situations, but it is narrower and more literal than the Russian.

Мне не до прогулок is broader than I can’t go for a walk. It suggests:

• I don’t feel well enough
• I’m not in the mood
• I’m in no condition
• it’s not appropriate right now

Because of the second clause, the idea is clearly illness, so good translations include:

• I’m not up for a walk today
• I don’t feel like going for walks today
• Today I’m in no condition for a walk

Yes. This pattern is very productive.

Examples:

• Мне не до шуток. = I’m not in the mood for jokes.
• Ему не до работы. = He’s not up to work.
• Нам не до разговоров. = We’re not in the mood for talking.
• Сейчас не до отдыха. = Now is not the time for rest.

Just remember the pattern: кому? + не до + genitive

Here it means the general activity, not a specific number of walks.

Russian often uses the plural to talk about an activity in a broad, indefinite way. So не до прогулок is not really counting walks. It means something like:

• not up for walks
• not up for going out walking
• not in the mood for that kind of activity

In English, the best translation may be singular or plural depending on style:

• not up for a walk
• not up for walks
• not up for going on walks

It is mostly neutral conversational Russian.

• Сегодня мне не до прогулок sounds natural in everyday speech.
• У меня высокая температура is also neutral and standard.

So the whole sentence would sound normal in conversation, a message to a friend, or even in fairly polite speech. It is not slang, and it is not especially formal either.