Last updated: August 21, 2025
In September, San Pedro de Atacama, Chile, experiences a striking temperature range, with daily maximums reaching 28°C (82°F) and minimums dipping to 0°C (32°F). The average temperature hovers around a pleasant 15°C (59°F). This month is particularly dry, with a meager 1 mm of precipitation and no recorded rainy days, making it an ideal time for outdoor adventures. Humidity levels remain moderate at 49%, creating a comfortable atmosphere for explorers and nature lovers alike in this stunning desert landscape.
In September, San Pedro de Atacama begins to shake off the chill of winter, with temperatures showing a welcome transition towards warmer days. The month kicks off with minimums around 0°C (32°F) and reaches a pleasant average of 15°C (59°F), peaking at a comfortable 28°C (82°F) during the day. This gradual rise marks a shift from the frigid lows of the preceding months, with temperatures noticeably warming as they head towards the sunny summer months ahead. The increasing warmth invites outdoor exploration of the stunning landscapes, creating the perfect backdrop for adventures in this breathtaking desert oasis. As you venture out, you'll experience the delightful contrast of cooler mornings and balmy afternoons, making September an ideal time to discover all that San Pedro de Atacama has to offer.
In September, San Pedro de Atacama experiences a notable decline in precipitation, receiving just 1 mm (0.0 inches) of rain throughout the month. This minimalist rainfall trend echoes the arid climate of the region, where September typically marks a transition to the drier season. Notably, the month recorded zero precipitation days, emphasizing the rarity of rain during this time. As the dry season solidifies its grip, San Pedro de Atacama remains a captivating destination for those seeking the stark beauty of its desert landscapes, characterized by striking contrasts and endless vistas. The preceding months show a gradual tapering from the relatively wetter early year, reinforcing the region’s reputation for having one of the driest climates on Earth.
In September, the humidity in San Pedro de Atacama settles at 49%, reflecting a subtle rise from the drier months of July and August, when humidity levels dipped to 51% and 43% respectively. This increase marks the beginning of a gradual humidification trend that persists into the following months, as the region transitions from the dry winter into the spring. Over the course of the year, humidity displays a distinct cycle, peaking in the summer months, particularly January and February, reaching up to 81%. The fluctuating humidity levels not only shape the town's climate but also influence local flora and fauna, creating a unique desert ecosystem that thrives against the odds.
In September, San Pedro de Atacama experiences a UV Index of 14, categorized as extreme, which aligns with the high UV levels prevalent in the previous months. As the seasons begin to shift, the burn time remains a swift 10 minutes, emphasizing the need for sun protection even during this transitional period. This trend of high UV exposure persists from late winter through spring, with the UV Index peaking in January and November at an extraordinary 18. Visitors and residents should stay vigilant and informed about sun safety in this sun-drenched region. For more detailed information on UV levels, check out the San Pedro de Atacama UV Index.
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September brings a delightful 346 hours of sunshine to San Pedro de Atacama, Chile, continuing the upward trend observed since the depths of winter. As the days lengthen, it's clear that spring has arrived, inviting visitors to bask in the warm glow of the desert sun. Compared to the preceding months, September enjoys a beautiful increase in sunshine hours, just shy of the peak summer months. As October approaches, the region promises even more radiant days ahead, culminating in an impressive 378 hours of sunlight, making this season an ideal time for adventurers and sun seekers alike to explore the stunning landscapes of this unique desert oasis.
In September, visitors to San Pedro de Atacama, Chile, can expect a 77% chance of sunny weather, continuing the region's trend of predominantly clear skies as the season transitions from winter to spring. This figure reflects a slight dip from the peak of 91% in August, yet remains comfortably above many earlier months like June and July. As the calendar shifts toward October, where the probability of sunshine rises to an enticing 93%, September serves as a pleasant prelude to the brighter days ahead. Overall, the data indicates that fall in this desert oasis typically offers a robust balance of warmth and sunlight, ensuring an enjoyable experience for travelers and adventurers alike.
As September unfolds in San Pedro de Atacama, Chile, the daylight duration begins its gentle transition toward longer days, providing 11 hours of sunlight. This marks a subtle increase from the steadily decreasing hours seen during the winter months, where daylight lingered at 10 hours for several consecutive months. The approach of spring heralds a promise of longer, sun-filled days, as the region prepares to embrace the warmth and vibrancy of October, which brings 12 hours of daylight. The gradual elongation of daylight serves as a reminder of nature's rhythms, creating an inviting atmosphere that resonates with both locals and visitors eager to explore this stunning desert landscape.
As September arrives in San Pedro de Atacama, the gentle caress of the wind begins to pick up, with an average speed of 2.8 m/s (6 mph). This marks a slight increase from the preceding months, where the wind hovered consistently around 2.4 to 2.5 m/s. It reflects a subtle transition towards the breezier conditions of late spring, a trend that continues into October. While September still enjoys the comfort of mild winds, the gradual uptick hints at the approaching warmth of the season, inviting both locals and travelers to experience the unique, captivating landscape under these tranquil yet invigorating breezes.
Weather in San Pedro de Atacama varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Pedro de Atacama, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in San Pedro de Atacama is characterized by mild temperatures, with a minimum of 0°C (32°F) and an average of 15°C (59°F), peaking at 28°C (82°F). The month is quite dry, seeing only 1 mm of precipitation over no rainy days and maintaining a humidity level of 49%. In contrast, January brings warmer temperatures, with a minimum of 9°C (49°F), an average of 19°C (66°F), and a maximum of 30°C (87°F). However, it experiences more precipitation, with 26 mm over five rainy days and significantly higher humidity at 75%. For more details on the climate during this time, you can check San Pedro de Atacama weather in January.
September and February exhibit contrasting weather patterns. In September, temperatures range from a chilly 0°C (32°F) at night, with a pleasant average of 15°C (59°F) during the day and a maximum of 28°C (82°F). The month experiences negligible precipitation, with only 1 mm recorded and no rainy days, alongside a moderate humidity level of 49%. In stark contrast, February sees warmer temperatures, with lows of 8°C (47°F) and an average of 18°C (65°F), peaking at a scorching 31°C (88°F). This month is also significantly wetter, receiving 54 mm (2.1 in) of rain over 7 days and experiencing higher humidity at 81%. For further details, see San Pedro de Atacama weather in February.
In September, the weather in San Pedro de Atacama is generally mild, with average temperatures ranging from a cool 0°C (32°F) at night to a warm 28°C (82°F) during the day. There is minimal precipitation, with only 1 mm recorded and no rainy days, contributing to a comfortable humidity level of 49%. In contrast, March experiences slightly higher temperatures, with a minimum of 7°C (45°F), an average of 18°C (64°F), and a maximum of 29°C (84°F). However, it is also more humid, reaching 84%, and sees around 11 mm of rainfall over two days. For a detailed overview of March weather, you can visit San Pedro de Atacama weather in March.
When comparing the weather in September and April, both months experience similar maximum temperatures, reaching up to 28°C (83°F). However, September tends to be cooler on average, with a temperature range from a minimum of 0°C (32°F) to a maximum of 28°C (82°F), while April's temperatures start slightly higher at a minimum of 2°C (36°F) and average around 16°C (60°F). Additionally, April sees more humidity at 71% compared to September's 49%, creating a different atmosphere altogether. While both months are mostly dry, April has a bit more precipitation, totaling 4 mm (0.2 in). For specific details on weather patterns during this time, see San Pedro de Atacama weather in April.
September generally offers warmer temperatures compared to May, with average highs reaching 28°C (82°F) versus May’s 25°C (77°F). However, May experiences slightly cooler nights, with a minimum temperature of -1°C (31°F), compared to September's minimum of 0°C (32°F). September also boasts lower humidity at 49%, while May’s humidity is higher at 60%. Additionally, precipitation is almost negligible in September, with no rainy days recorded, in contrast to May, which sees about 3 mm of rain over a single day. For more detailed insights on May weather, you can check San Pedro de Atacama weather in May.
In comparing the weather between September and June, September boasts a significantly warmer climate, with average temperatures around 15°C (59°F) and a maximum of 28°C (82°F). In contrast, June experiences cooler conditions, with an average temperature of 10°C (51°F) and a maximum of 24°C (76°F). Both months see minimal precipitation, with September recording just 1 mm and June slightly higher at 6 mm, although both have 0 days of rainfall. Humidity levels are relatively similar, with September at 49% and June at 52%. For a detailed look at June weather in the region, you can visit San Pedro de Atacama weather in June.
In comparing the weather of September and July, September showcases a broader temperature range with a minimum of 0°C (32°F) and an average of 15°C (59°F), peaking at 28°C (82°F). July, on the other hand, has cooler temperatures, with a minimum of -4°C (25°F) and an average of 11°C (51°F), reaching a maximum of only 24°C (75°F). Both months experience minimal precipitation, with just 1 mm recorded and no rainy days observed. The humidity remains similar in both months, at around 49% in September and 51% in July. For a more detailed look at July conditions, you can visit San Pedro de Atacama weather in July.
In comparing the weather of September and August, September boasts a noticeably warmer climate with average temperatures ranging from a minimum of 0°C (32°F) to a maximum of 28°C (82°F), an increase from August’s range of -2°C (29°F) to 25°C (78°F). Additionally, September experiences extremely low precipitation at only 1 mm (0.0 in), while August sees slightly higher rainfall totaling 6 mm (0.2 in). Humidity levels also rise slightly in September to 49%, compared to August's 43%. For a more detailed look at conditions in August, you can refer to San Pedro de Atacama weather in August.
In September, temperatures range from a minimum of 0°C (32°F) to a maximum of 28°C (82°F), with an average of 15°C (59°F). The month sees very little precipitation, with just 1 mm recorded and no rainy days, while humidity stands at a comfortable 49%. In contrast, October experiences slightly warmer temperatures, with a low of 0°C (33°F) and a high of 29°C (84°F), averaging 17°C (62°F). Like September, October also boasts dry conditions with no precipitation. Humidity remains consistent at 49%. For more detailed information, visit San Pedro de Atacama weather in October.
In September, the weather in San Pedro de Atacama is generally mild, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 28°C (82°F) and an average of 15°C (59°F). The month is characterized by low humidity at 49% and virtually no precipitation. In contrast, November sees a slight increase in both minimum and maximum temperatures, with a low of 4°C (39°F), a high of 30°C (86°F), and an average of 18°C (65°F). Additionally, November maintains low humidity at 47% and remains dry with no recorded precipitation. For more detailed insights, you can check the San Pedro de Atacama weather in November.
In September, the weather is relatively mild, with temperatures ranging from a low of 0°C (32°F) to a pleasant high of 28°C (82°F). The average temperature sits at around 15°C (59°F), and this month typically experiences no precipitation, accompanied by a moderate humidity level of 49%. In contrast, December brings warmer temperatures, with a minimum of 6°C (43°F) and a maximum of 32°C (90°F), averaging 19°C (66°F). Additionally, December sees a slight increase in precipitation to 6 mm (0.2 in) over one day and a rise in humidity to 53%. For more details on December's weather, you can visit San Pedro de Atacama weather in December.
September in San Pedro de Atacama marks the transition into spring, offering visitors a unique experience distinct from other months. With mild average temperatures and a refreshing lack of precipitation, the weather is ideal for outdoor exploration. Compared to the colder winter months, September's warmth invites adventure under the vast, clear skies, making it a perfect time to witness the stunning landscapes. The comfortable humidity levels enhance the enchanting atmosphere, setting the stage for a memorable trip. For a deeper understanding of what to expect year-round, explore our detailed guide on San Pedro de Atacama Climate.