Monthly climate guide
San Pedro de Atacama weather in September
Expect warm weather in San Pedro de Atacama in September: afternoons reach about 23°C (73°F), while nights drop to around 5°C (40°F). Around 0 mm of rain falls over the month (very dry), and skies are mostly sunny. Daytime highs are 2°C warmer than August and 2°C cooler than October.
What stands out in September
- San Pedro de Atacama is usually about 5°C warmer than Antofagasta, 240 km away, in September.
- Evenings cool off sharply: the daily range is around 18°C, so pack a layer.
- It's one of the sunniest months here, with cloud cover around 21%.
- September sits in San Pedro de Atacama's drier season — usually a comfortable time to visit.
Avg high
23°C
73°F
Avg low
5°C
40°F
Rainfall
0 mm
very dry
Humidity
13%
relative
Sky
21%
cloud · mostly sunny
San Pedro de Atacama weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 27°C / 80°F | 10°C / 50°F | 5 mm | 29% | 40% |
| February | 26°C / 79°F | 10°C / 50°F | 4 mm | 34% | 41% |
| March | 25°C / 78°F | 9°C / 48°F | 3 mm | 25% | 22% |
| April | 24°C / 74°F | 7°C / 44°F | 1 mm | 19% | 23% |
| May | 20°C / 69°F | 4°C / 39°F | 1 mm | 16% | 27% |
| June | 19°C / 66°F | 2°C / 36°F | 0 mm | 17% | 31% |
| July | 19°C / 66°F | 2°C / 35°F | 1 mm | 15% | 31% |
| August | 21°C / 69°F | 3°C / 37°F | 1 mm | 13% | 25% |
| September | 23°C / 73°F | 5°C / 40°F | 0 mm | 13% | 21% |
| October | 24°C / 76°F | 6°C / 43°F | 1 mm | 14% | 23% |
| November | 26°C / 78°F | 7°C / 45°F | 1 mm | 15% | 20% |
| December | 27°C / 80°F | 9°C / 48°F | 4 mm | 20% | 27% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is September a good time to visit San Pedro de Atacama?
Compare the months in the chart above to find your ideal window.
Best time to visit San Pedro de Atacama →Other Chile cities in September
Cite or embed this data
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San Pedro de Atacama weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/chile/san-pedro-de-atacama/september
<a href="https://weathercompare.eu/weather/chile/san-pedro-de-atacama/september">San Pedro de Atacama weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/chile/san-pedro-de-atacama" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="San Pedro de Atacama weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/chile/san-pedro-de-atacama/september">San Pedro de Atacama weather in September</a> – WeatherCompare</p>
San Pedro de Atacama in September: quick answers
Is September a good time to visit San Pedro de Atacama?
September is a reasonable time for San Pedro de Atacama: highs around 23°C and about 0 mm of rain, though not one of the three best months.
How warm is San Pedro de Atacama in September?
Average highs are about 23°C (73°F) and average lows about 5°C (40°F), based on 10 years of daily data.
Does it rain a lot in San Pedro de Atacama in September?
San Pedro de Atacama typically gets around 0 mm of rain in September — very dry.
Figures are long-term averages for the area around San Pedro de Atacama (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.