Last updated: August 21, 2025
September in El Chaltén, Argentina is characterized by a crisp and invigorating climate, with an average temperature hovering around -1°C (30°F). Expect maximum daytime temperatures reaching a cool 8°C (47°F), while nights can plunge to a brisk -12°C (10°F). The region experiences significant precipitation, accumulating up to 235 mm (9.2 in) over 22 rainy days, contributing to the lush landscapes that define this stunning area. With a humidity level of around 90%, the air feels moist, adding a certain charm to the dramatic Patagonian scenery. Whether trekking or simply taking in the sights, layers and waterproof gear are essential for enjoying the breathtaking vistas amidst the changing weather.
As September arrives in El Chaltén, Argentina, the onset of spring brings a subtle yet noticeable shift in temperatures. With minimums hovering around -12°C (10°F) and averages inching up to -1°C (30°F), it's a time when the chill of winter begins to wane. The maximum temperature reaches a mild 8°C (47°F), offering a glimpse of the warmer days to come. Compared to the preceding months, where temperatures often dipped more drastically, September marks a transition toward the more temperate conditions of spring. This evolving climate invites adventure seekers to explore the stunning landscapes of Patagonia, as the days gradually brighten and nature awakens from its winter slumber.
In September, El Chaltén experiences a noteworthy precipitation total of 235 mm (9.2 in), falling comfortably within the lush climatic patterns of Patagonia. With 22 rainy days, this month marks a transition from the wetter winter months, hinting at the onset of spring. Notably, while the total precipitation is slightly lower than August's record, September’s consistent rainfall continues to nourish the area's vibrant ecosystems. As the days gradually lengthen, the effects of this precipitation support a lush revival of flora, setting the stage for breathtaking landscapes in the months to come. This mix of rain and emerging warmth signals a shift in the season, inviting nature enthusiasts to witness El Chaltén's stunning transformation.
In September, El Chaltén experiences a humidity level of 90%, marking a slight decrease from the peak often recorded in the winter months. This transition reflects the gradual shift towards warmer spring weather, as humidity levels begin to stabilize after climbing from a low of 88% in January to a high of 94% in July. With the arrival of September, temperatures rise while humidity levels remain relatively high, creating a fresh and crisp atmosphere that is ideal for outdoor adventures. The consistent moisture in the air throughout the year highlights El Chaltén's stunning natural beauty, making it a picturesque destination for nature lovers.
September in El Chaltén marks a significant transition in UV exposure, as the UV Index rises to 7, categorizing the risk as high with a burn time of just 25 minutes. This shift signals the end of winter's low UV levels and the gradual approach of spring. Compared to the previous months, where June and July had a low index of 2, this uptick demands a more cautious approach for outdoor enthusiasts. As summer approaches, the UV Index will continue to climb, peaking in the following months. For a detailed forecast and to better prepare for your adventures, check out the comprehensive insights at El Chalten UV Index. Enjoy the stunning landscapes while being sun-safe!
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As September rolls in, El Chaltén, Argentina, begins to bask in the embrace of 158 hours of sunshine, signaling a beautiful transition into spring. This month marks a noticeable uplift in daylight hours compared to the previous winter, where sunshine dwindled to a paltry 92 hours in June and July. This gradual increase that kicks off in August paves the way for October and November, which shine brightly with 203 hours and 217 hours, respectively. The steady rise in sunlight heralds not only the warmth of spring but also the stunning landscapes and outdoor adventures that await, making September an ideal time for travelers to explore the breathtaking beauty of Patagonia.
In El Chaltén, Argentina, September brings a 23% chance of sunny weather, marking a transitional period as the region shifts from winter to spring. This month mirrors the sunny prospects of January and October, when the likelihood of sun also stands at 23%. Interestingly, the chances for sunshine begin to rise from the lower percentages seen in the colder months, such as July and August, where the numbers dip to 12% and 14% respectively. As spring approaches, there's a noticeable trend toward increased sun exposure, culminating in a promising November at 28%. While September may not guarantee clear skies, it certainly signals a positive turn in the weather, beckoning outdoor enthusiasts eager to experience the stunning landscapes of Patagonia.
In El Chaltén, Argentina, September marks a subtle transition in daylight hours as the days begin to lengthen following the winter months. With 11 hours of daylight, this month signals a gradual increase from the 8 hours experienced during the depths of winter, paving the way towards the longer, sun-soaked days of spring. As the sun rises earlier and sets later, the scenery becomes a canvas of vibrant colors, inviting outdoor enthusiasts to explore the breathtaking landscapes. This trend of increasing daylight continues into October, where daylight extends to 13 hours, heralding the onset of warmer weather and longer adventures. The natural rhythm of light in El Chaltén beautifully reflects the changing seasons, encouraging a connection to the stunning Patagonian wilderness.
As September arrives in El Chaltén, the winds present a gentle but persistent breeze, averaging 2.1 m/s (5 mph). This month mirrors the calm of the preceding summer months, with winds consistently hovering around the same speed since August. The trend from January through September shows a slight decline from the summer's breezy disposition, with only a minor dip in the average wind speeds. However, as fall approaches, a slight uptick is expected in October, pushing the average to 2.5 m/s (6 mph). Overall, September offers a serene transition into the crispness of autumn, where the enchanting landscapes of Argentina's Patagonia can be enjoyed amidst a soft, refreshing wind.
Weather in El Chalten varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in El Chalten, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in September and January, notable differences emerge in temperature and precipitation levels. September experiences colder temperatures, with a minimum of -12°C (10°F) and an average of -1°C (30°F), while January is milder with a minimum of -10°C (13°F) and an average of 4°C (40°F). In terms of precipitation, September sees 235 mm (9.2 in) over 22 days, closely followed by January, which has slightly higher precipitation at 249 mm (9.8 in) spread across 21 days. Humidity levels are relatively similar, with September at 90% and January at 88%. For more detailed insights into January weather, you can explore El Chalten weather in January.
September and February present contrasting weather conditions in El Chaltén. In September, temperatures range from a chilly minimum of -12°C (10°F) to a maximum of 8°C (47°F), with an average temperature hovering around -1°C (30°F). This month experiences significant precipitation, with 235 mm (9.2 in) spread over 22 days, contributing to a high humidity of 90%. In contrast, February sees much milder temperatures, with a minimum of -7°C (20°F) and a maximum reaching 20°C (69°F), averaging around 6°C (42°F). Precipitation is lower in February, totaling 192 mm (7.6 in) over 19 days, while maintaining similar humidity levels of 90%. For more specific weather details, you can check El Chalten weather in February.
In September, temperatures in El Chaltén typically range from a minimum of -12°C (10°F) to a maximum of 8°C (47°F), averaging around -1°C (30°F). The month experiences significant precipitation, with 235 mm (9.2 in) spread over 22 days and high humidity at 90%. In contrast, March sees slightly warmer temperatures, with lows of -10°C (15°F) and highs reaching 14°C (57°F), resulting in an average temperature of 4°C (39°F). Although March has more precipitation at 261 mm (10.3 in), it occurs over fewer days (20 days) and maintains a similar humidity level at 89%. For more detailed information, visit El Chalten weather in March.
In comparing the weather of September and April, both months exhibit chilly temperatures, but April tends to be slightly milder overall. In September, temperatures range from a minimum of -12°C (10°F) to a maximum of 8°C (47°F), with an average of -1°C (30°F). In contrast, April showcases a broader temperature range, with lows of -14°C (8°F) and highs reaching up to 12°C (54°F), resulting in a modest average of 1°C (34°F).
Precipitation levels also differ; September receives 235 mm (9.2 in) over 22 days, while April sees increased rainfall at 313 mm (12.3 in) over the same number of days. Both months maintain high humidity levels, around 90% in September and slightly higher at 91% in April. For those interested in the specific weather conditions during April, further details can be found at El Chalten weather in April.
When comparing the weather in September and May, both months exhibit similar average temperatures, hovering around -1°C (30°F), with maximum temperatures reaching about 8°C (47°F) and 8°C (46°F) respectively. However, September tends to be slightly milder, with a minimum temperature of -12°C (10°F) compared to May's -14°C (7°F). Precipitation is notable in both months, with September receiving 235 mm (9.2 in) over 22 days and May exceeding that with 266 mm (10.5 in) across 21 days. Humidity levels are also comparable, with September at 90% and May slightly higher at 92%. For more specific insights into May's weather, you can explore El Chalten weather in May.
In comparing the weather of September and June, we observe notable differences in temperature and overall conditions. September typically features a milder average temperature of -1°C (30°F), with a maximum of 8°C (47°F), while June presents colder conditions, with an average of -4°C (25°F) and a maximum of just 4°C (40°F). Both months experience similar levels of precipitation, with September recording 235 mm (9.2 in) and June slightly higher at 241 mm (9.5 in), occurring over the same number of days: 22. Additionally, humidity levels are quite high in both months, peaking at 90% in September and slightly higher at 93% in June. For more detailed information about the weather in June, you can check El Chalten weather in June.
When comparing the weather in September and July, September tends to be slightly milder with an average temperature of -1°C (30°F), while July has a lower average of -4°C (26°F). Although both months experience high humidity levels, September's humidity is at 90%, just a bit lower than July's 94%. Precipitation levels are also quite similar, with September seeing 235 mm (9.2 in) over 22 days compared to July's 248 mm (9.8 in) over the same number of days. For more detailed information on July weather, you can visit this link: El Chalten weather in July.
When comparing the weather in September and August, September emerges as slightly warmer, with average temperatures rising from August's -3°C (28°F) to -1°C (30°F). While September experiences a max temperature of 8°C (47°F), August peaks at 6°C (43°F). However, September also has a higher precipitation level, with 235 mm (9.2 in) falling over 22 days, compared to August's 270 mm (10.6 in) over 24 days. Humidity remains high in both months, with September at 90% and August at 93%. For a closer look at August weather, you can visit El Chalten weather in August.
In September, temperatures range from a minimum of -12°C (10°F) to a maximum of 8°C (47°F), with an average temperature of -1°C (30°F). The month experiences significant precipitation, totaling 235 mm (9.2 in) over 22 days, and humidity remains high at 90%. Comparatively, October sees a slight drop in minimum temperatures, with lows around -16°C (4°F) and an unchanged maximum of 8°C (47°F), leading to an average of 0°C (32°F). Precipitation increases slightly to 243 mm (9.6 in) across 23 days, while humidity remains consistent at 90%. For a detailed look at the October weather patterns, check out El Chalten weather in October.
In comparing the weather between September and November, both months experience similar precipitation levels, with September recording 235 mm over 22 days and November also receiving 235 mm but over 21 days. September tends to be colder, with minimum temperatures dipping to -12°C (10°F) and an average of -1°C (30°F), while November sees a slight increase with minimums of -8°C (18°F) and an average temperature of 2°C (35°F). Humidity remains fairly constant, with September at 90% and November slightly lower at 89%. Overall, November offers a marginally milder climate, making it a more favorable time to explore the region. For more specifics on November's weather, check out El Chalten weather in November.
In comparing the weather of September and December, it is evident that December experiences milder temperatures, with a minimum of -7°C (20°F) and an average of 4°C (39°F), compared to September's colder readings of -12°C (10°F) and an average of -1°C (30°F). Additionally, December sees a notable increase in maximum temperatures, reaching up to 16°C (62°F) versus September's maximum of 8°C (47°F). Precipitation levels are quite similar, with December registering 259 mm (10.2 in) and September at 235 mm (9.2 in), both occurring over 22 days. Humidity remains high in both months, slightly lower in December at 88% compared to 90% in September. Overall, December offers a warmer and slightly less humid experience, which can be further explored through this link: El Chalten weather in December.
As September unfolds in El Chaltén, the weather begins to shift from the depths of winter, showcasing a blend of cool temperatures and frequent precipitation. Unlike the colder months, the maximum temperatures inch closer to 8°C, providing a glimpse of warmth amidst the crisp air. However, the month is characterized by high humidity levels and nearly three weeks of rainfall, making it one of the wetter times of the year. This is a stark contrast to the drier summer months that follow, as nature sheds its winter cloak in preparation for the vibrant colors of spring. For a deeper insight into the year-round weather patterns, explore the comprehensive guide at El Chalten Climate.