Chile, South America
Atacama Desert in September
Spring begins with clear skies and fewer visitors. Chile's Fiestas Patrias on September 18 and 19 bring a national holiday week.
The straight answer
September is one of the best months of the year to visit Atacama Desert. Spring begins with clear skies and fewer visitors. Chile's Fiestas Patrias on September 18 and 19 bring a national holiday week.
- Weather
- Warming, days near 73F (23C), cold nights
- Crowds
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- Prices
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What September is like in Atacama Desert
September is spring in the Atacama and one of the best months. Days warm to near 73F (23C), nights stay cold, and skies are clear. Visitor numbers are low for most of the month. The big exception is Fiestas Patrias on September 18 and 19, Chile's national holidays, which bring a busy week of domestic travel.
It suits nearly everyone: stargazers, hikers and families who want mild days and open roads. If you want the quietest trip, avoid the week around the national holidays. If you would rather have warmer nights, October is just as good.
Make the most of September
What is especially good about Atacama Desert this month.
Fiestas Patrias
On September 18 and 19, Chile celebrates with fondas, food and cueca dancing. It is a lively time to be in the country.
The end of Milky Way season
The core is still visible in the evening, so early September nights are great for telescope tours.
Open roads to the high lagoons
Winter snow is usually gone, and trips to Miscanti and Miniques run reliably.
What to pack for September
- Warm layers for cold mornings
- A light jacket for mild afternoons
- Sunscreen and a sun hat
- Comfortable hiking shoes for the valleys
Our timing tip
Book rooms early if your dates touch September 18 and 19, since the national holiday week fills San Pedro.
Book Atacama Desert for September.
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- Hotels for September
Hotels. Expedia
Hotels in Atacama DesertOpens a hotel search for Atacama Desert in September, dates filled in. Book early for the best months: the good rooms go first.
- Rentals on Vrbo
Vacation rentals. Vrbo
Vacation rentals in Atacama DesertWhole homes, condos and villas. Usually the better deal for families and groups, with a kitchen and room to spread out.
- Tours and tickets
Tours and tickets. Expedia
Tours and tickets in Atacama DesertTimed-entry tickets, day trips and guided tours in Atacama Desert for September. Popular slots sell out in the best months.
What's on in September
Fiestas Patrias
September 18 and 19 every year
Chile's national holidays, with fondas, cueca dancing, and a busy week for domestic travel.
Milky Way core season
Roughly April through September
The brightest part of the Milky Way is overhead in the evening. Plan around the new moon for the best views.
Things to do in Atacama Desert
Valle de la Luna
A valley of salt formations, dunes, and ridges. Sunset from the viewpoints is the classic experience; entry is limited, so book ahead in high season.
El Tatio geysers
Leave San Pedro before dawn to see the geysers at their most active. It is freezing at that hour in any season, so dress in layers.
Stargazing tour
Local operators set up telescopes outside town. Book on nights close to the new moon for the darkest skies.
Laguna Cejar
A salt lagoon so dense you float, a short drive from San Pedro. Rinse off afterward; the salt dries fast.
Altiplanic lagoons (Miscanti and Miniques)
Deep blue lakes below volcanoes at over 13,000 feet. Go after a few days acclimatizing in San Pedro.
ALMA Observatory
One of the world's largest radio telescope arrays. Free public visits to the operations support facility run on weekends and must be booked in advance.
Beat the crowds
- Avoid Chile's summer holidays (January and February) and the July winter break, when San Pedro fills with domestic travelers.
- Book stargazing tours for nights near the new moon; tours still run on full moon nights, but the stars are washed out.
- Spend the first two days on lower-altitude trips like Valle de la Luna before tackling El Tatio and the high lagoons.
- April, May, October, and November combine clear weather with lower prices and fewer visitors.
Know before you go
- Summer storms in January and February can close roads and cancel tours to El Tatio, the high lagoons, and the Bolivian border.
- Winter snow in June through August can close the high passes and routes to Uyuni.
- Valle de la Luna and some other sites are managed by local Indigenous communities or public agencies and may close on certain days or have capped entry.
- ALMA public visits run only on weekends and require advance booking.
Atacama Desert in September, quick answers
Is September a good time to visit Atacama Desert?
September is one of the best months of the year to visit Atacama Desert. Spring begins with clear skies and fewer visitors. Chile's Fiestas Patrias on September 18 and 19 bring a national holiday week.
What is the weather like in Atacama Desert in September?
Warming, days near 73F (23C), cold nights.
Is Atacama Desert crowded in September?
September is one of the quieter months in Atacama Desert; most sights can be done without long waits.
What is happening in Atacama Desert in September?
Fiestas Patrias (september 18 and 19 every year); Milky Way core season (roughly april through september).
Keep planning Atacama Desert.
The months either side, and the best one if this is not it.
Also at their best in September
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