By Harry Nara · Last updated
Mexico City sits at about 2,240 metres, which is two hundred below the elevation at which anyone officially warns you about altitude. That is exactly why nobody does, and why the second night is usually the hard one. Build the first two days around it and the rest of the trip is straightforward.
The number that explains most of a first trip here is 2,240, roughly the height in metres at which the city sits. The airport is at 2,230 and is classified as hot and high, which means the thin air measurably reduces what an aircraft can do on the runway. If the altitude is doing something to the plane you arrive on, it is reasonable to expect it to do something to you.
What makes it awkward is that Mexico City sits just under the line. The CDC puts the usual threshold for altitude illness at 2,450 metres and says plainly that it can happen lower, with particularly susceptible people affected from around 1,800. The city is in between. Most visitors feel nothing worse than being out of breath on a staircase they would not have noticed at home, and a meaningful minority spend a day with a headache wondering what they ate.
So the useful advice here is not medical, it is scheduling. Symptoms usually begin two to twelve hours after arrival and often during or after the first night, which is why this catches people on day two rather than day one. The standing guidance for anyone arriving at altitude is mild exercise only for the first forty-eight hours and no alcohol inside the same window. In a city built for walking, eating and drinking late, that is a real constraint, and the cheapest place to spend it is at the start.
How long do you need in Mexico City?
Give it four days. The city is enormous but the part a first visit wants is not, and four covers the Centro, Chapultepec with the Anthropology Museum, Coyoacan, and a day out to Teotihuacan. A fifth buys you Xochimilco without rushing it. What four days will not absorb is a wasted first one, which is the argument for arriving with nothing booked on it.
Before you go
Not lightly booked, empty. The instinct on landing is to drop the bags and walk the Centro, which is precisely the thing the first forty-eight hours are not for. Put the museum that needs a timed ticket on day three, not day one, and you remove the only real risk this trip carries: paying for something you then feel too rough to enjoy.
The Tarjeta de Movilidad Integrada costs 15 pesos plus whatever you load onto it, and one card covers the Metro at 5 pesos a journey, the Metrobus at 6, the Cablebus at 7, the Tren Ligero at 3 and the Trolebus from 4. You can buy it at Metro and Tren Ligero ticket windows and from machines at the Metrobus, Cablebus and Trolebus. Get one on arrival and stop thinking about fares.
Thin air filters less ultraviolet, so the sun at this height is harder than the temperature suggests and the temperature is mild rather than hot. The other half of it is the daily swing: afternoons in the low twenties, nights that drop towards single figures in the dry months. A hat and a real jacket, not one or the other.
This is the one part of the altitude question that is not about pacing. Moderate elevation is unremarkable for most healthy travellers and is not unremarkable for everyone, and a doctor who knows your history is the only person who can tell you which you are. Ask early enough that the answer can still change the booking.
Once you are there
The standing advice at altitude is mild exercise only for the first forty-eight hours, and in this city that translates into something specific: pick one neighbourhood a day and stay in it. Roma to Condesa is a flat and shaded afternoon. The Centro plus Chapultepec plus a museum is not, however reasonable it looks on a map.
Alcohol is the other half of the same guidance, and the recommendation is to avoid it entirely for the first forty-eight hours. That is a genuinely annoying thing to be told in the city that invented the cantina, and it is also the single change that most reliably prevents a bad second day. The mezcal will still be there on Thursday.
Disturbed sleep is the most common complaint at elevation, ahead of headache, and it is worth knowing in advance so you read it correctly rather than blaming the mattress or the street noise. It settles as you acclimatise, which takes three to five days, so on a four-day trip you will feel the difference by the end.
The city sits in a bowl ringed by mountains, which traps what it produces, and the authorities declare contingencies when ozone climbs. The worst of it is the dry spring, and it is a separate thing from altitude even though the two feel similar in the chest. Check before a long day outdoors rather than assuming the sky tells you.
What it costs
Transport is the cheap part and stays cheap: 5 pesos a Metro journey, 6 on the Metrobus, on a card that costs 15.
Tipping is expected in restaurants at around 10 to 15 per cent and is not usually included, so check the bill before adding to it, because some places add a service charge and a few do it without saying so. Cards are taken almost everywhere a visitor eats, but the taco stand that turns out to be the best meal of the trip will not take one, so carry small notes.
Two taxes sit on a hotel bill and they are quoted separately. Lodging is taxed at 3 per cent under the city fiscal code, and the federal IVA is quoted apart from it, so a headline room rate may be neither what you pay nor what the site implied. Check which one a price includes before you compare two of them.
Going with children
Children handle the altitude about as well as adults do, which is to say mostly fine with the same two-day caveat, and the practical difference is that a tired child cannot tell you it is the altitude. The same rule works for everybody: one neighbourhood a day, and nothing that depends on covering distance.
What the city gives you in return is unusually good. Chapultepec is enormous and free to walk in, with a zoo that costs nothing, a castle on a hill and the Anthropology Museum on one edge of it. Xochimilco is a boat with a picnic on it. The Papalote children’s museum, in the second section of Chapultepec, is built for exactly this. None of it requires a plan more complicated than picking one.
Going alone
Solo is easy here in the ways that matter and the altitude adds one wrinkle worth naming: there is nobody to notice you are struggling. The headache and the disturbed sleep arrive quietly and get explained away as jet lag or a long flight, and a person travelling alone has nothing to compare against.
The fix is unglamorous. Book the first two nights somewhere with a staffed desk at any hour rather than a lockbox and an app, so that if the second night does go badly there is somebody downstairs. That is the whole of it.
Otherwise this is a straightforward solo city. Roma and Condesa are full of people eating alone without it being a statement, the Metro is easy and cheap, and the museums are better alone than with company. The ordinary precautions of a large Latin American capital apply and nothing beyond them: use an app rather than a street taxi at night, keep the phone out of sight on a busy Metro, and be deliberate about the walk home rather than the walk out.
Mistakes worth avoiding
It is the single most common way to spend day two in a hotel room. The Centro is not going anywhere and the first forty-eight hours are the ones the guidance is about.
A headache with poor sleep and no appetite, starting some hours after arrival, is a much better match for mild altitude effects than for anything you ate. The distinction matters because one of them resolves by resting and the other does not.
It is the standard move after a long flight and it is the one explicitly advised against at elevation, for sleep in particular. It makes the night worse rather than better.
The Anthropology Museum takes half a day of standing and deserves your attention. Put it on day three, when you have it to give.
An address that says only Coyoacan or Cuauhtemoc has told you almost nothing, because those are boroughs holding dozens of colonias between them. The colonia line is the one that locates you.
Twenty-two degrees at this elevation burns in a way twenty-two degrees at sea level does not. The temperature is not the variable that matters.
Frequently Asked Questions
Is Mexico City worth visiting?
Yes, and it is one of the best-value big-city trips anywhere: the Anthropology Museum is world class, Chapultepec is one of the largest city parks in the Americas, the food runs from street stalls to restaurants with international reputations, and the whole thing costs a fraction of a comparable European capital. The one thing to plan around is the altitude, and planning around it means little more than taking the first two days gently.
Will I get altitude sickness in Mexico City?
Probably not in any serious form. The city is at about 2,240 metres, below the 2,450 at which altitude illness becomes common, though the guidance notes it can occur lower and that susceptible people are affected from around 1,800. Most visitors notice only breathlessness on stairs. A minority get a headache, poor sleep and no appetite, usually starting during or after the first night, and it typically clears within a day or two if you do not climb higher.
What should I do on my first day in Mexico City?
As little as possible, on purpose. The standing advice for arriving at altitude is mild exercise only for the first forty-eight hours and no alcohol in that window, so the ideal first day is one neighbourhood on flat ground, an early dinner and a long night. Roma and Condesa are made for exactly that. Save the Centro, Chapultepec and anything with a timed ticket for day three.
How many days do you need in Mexico City?
Four is the working answer, covering the Centro, Chapultepec and the Anthropology Museum, Coyoacan, and a day at Teotihuacan. A fifth lets you add Xochimilco without rushing. Fewer than four is possible but leaves no slack for a slow start, and a slow start is the thing this particular city asks for.
Is Mexico City good for families with children?
Unusually so. Chapultepec alone covers several days, with free entry to the park and the zoo, a castle and the Anthropology Museum on its edge, and the Papalote children’s museum in the park’s second section. Xochimilco is a boat trip with a picnic. The altitude affects children about as it does adults, with the same first-two-days caveat, and the practical point is that a small child will not be able to tell you that is what is wrong.
Is Mexico City safe for solo travellers?
Yes, with the ordinary precautions of any large capital and one that is specific to here. Use a ride-hailing app rather than a street taxi at night, keep your phone out of sight on a crowded Metro, and think about the route back rather than the route out. The altitude-specific point is that nobody will notice if you are struggling, so it is worth booking the first two nights somewhere with a staffed desk rather than a lockbox.
Can you drink the tap water in Mexico City?
No, and neither does anyone who lives there. Filtered or bottled water is the routine in Mexican households and restaurants rather than a precaution taken for visitors, so following the local habit is the whole answer: drink bottled or filtered, and use it for brushing your teeth if you want to be careful. Hotels almost always provide it, and every shop sells large bottles for very little.
How do you get around Mexico City?
On one card. The Tarjeta de Movilidad Integrada costs 15 pesos and covers the Metro at 5 pesos a ride, the Metrobus at 6, the Cablebus at 7, the Tren Ligero at 3 and the Trolebus from 4, and you can buy it at Metro ticket windows or machines on the other systems. Ride-hailing apps work well and are cheap by international standards. Driving yourself is the one bad answer.
What is the best time of year to visit Mexico City?
November, then February into March. The temperature barely moves across the year, so the real variable is rain: the dry season runs November to April and the wet season May to October brings clear mornings and heavy afternoons. April is the hottest month of the year and sits at the peak of the ozone season, which makes it the one to avoid.
Checked against CDC Yellow Book, High-Altitude Travel and Altitude Illness, Tarjeta de Movilidad Integrada, fares and where to buy, Codigo Fiscal de la Ciudad de Mexico, art. 164 (lodging tax), Gobierno de la Ciudad de Mexico.
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