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San Pedro de Atacama Weather in September
September in San Pedro de Atacama sees daytime temperatures around 21°C (70°F) and lows of 4°C (39°F) at night. The excellent weather makes it a good time to visit.
Rainfall in San Pedro de Atacama in September
Rain is expected on roughly a single day, totalling around 1 mm (0.04 in) for the month. If rain does fall, it tends to be very light and barely worth getting out an umbrella for.
Temperature in San Pedro de Atacama in September
If you're visiting San Pedro de Atacama in September, expect excellent temperatures with highs of 21°C (70°F) and overnight lows of 4°C (39°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, May, August, September, October, November and December typically offer the best circumstances for San Pedro de Atacama.
San Pedro de Atacama Temperature in September
Min Temperature
4°C (39°F)
Max Temperature
21°C (70°F)
Chance of Rain
4%
Precipitation
1 mm (0.04 in)
Rainy days
a single day
Humidity
13%
San Pedro de Atacama Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Pedro de Atacama - and find the best time to visit.
Historical weather records for San Pedro de Atacama in September
Browse day-by-day weather records for San Pedro de Atacama spanning 21 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Pedro de Atacama historical weather extremes in September
The extremes listed below come from historical weather data collected in San Pedro de Atacama from 2006 through 2026.
- The hottest September day on record in San Pedro de Atacama reached 28°C (82°F) (September 27, 2026).
- The coldest September day was on September 8, 2019, with a maximum of 16°C (61°F).
- Nighttime temperatures dropped to 0°C (32°F) on September 1, 2025, marking the coldest September night on record.
Best Places in Chile in September
Find out more about the weather in Chile and which places have the best travel conditions in this month. See all of Chile in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San Pedro de Atacama in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. With minimal rainfall expected, you can leave the rain gear at home.
What To Do in San Pedro de Atacama in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Camping5/10 -
Outdoor sports10/10
San Pedro de Atacama 3-Day Forecast
More climate data for San Pedro de Atacama
See the full San Pedro de Atacama climate overview or explore weather in Chile.
Popular in September
Where to go in September - average daytime high across popular destinations.
San Pedro de Atacama
21°C (70°F) Hanga Roa
21°C (70°F) La Serena19°C (66°F) Santiago18°C (64°F) Viña del Mar16°C (61°F) Concón16°C (61°F) Valparaíso15°C (59°F) Pucón
13°C (55°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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