Last updated: August 21, 2025
In Osorno, Chile, September showcases a transition into spring, with temperatures ranging from a brisk minimum of -2°C (30°F) to a comfortable maximum of 21°C (69°F). The average temperature settles at a mild 8°C (47°F), creating an inviting atmosphere for outdoor activities. With precipitation totaling 126 mm (5.0 in) across 13 days, the month is characterized by frequent rain, contributing to the region's lush greenery. Coupled with an 85% humidity level, the weather in September is a blend of cool breezes and refreshing showers, typical for this part of Patagonia.
In September, Osorno, Chile begins to shake off the winter chill, with temperatures gradually warming as spring approaches. The month sees minimum temperatures hovering around -2°C (30°F), while average highs reach a comfortable 21°C (69°F). This transition is marked by an increase from the colder, damp days of winter, as the city experiences a gentle rise in warmth and daylight. With the chill of winter lifting, September invites outdoor activities and showcases the region's vibrant landscapes, making it an ideal time for those looking to embrace the beauty of the coming season.
In September, Osorno experiences a shift towards increased rainfall, receiving 126 mm (5.0 in) of precipitation over 13 days. This notable drop from the previous months, where August saw the highest figures at 238 mm (9.4 in), indicates the transition from winter's peak to the drier spring season. The average precipitation during this month plays a crucial role in nurturing the lush surroundings, as the region gradually prepares for October's anticipated 121 mm (4.8 in). Despite the reduction in rainfall, September remains pivotal in contributing to the area's ecological vibrancy, balancing between the lingering effects of winter and the approaching warmth of spring.
In Osorno, Chile, September experiences a notable humidity level of 85%, marking a slight decline from the consistently high figures seen in the preceding winter months, where humidity peaked at 87% in both July and August. As the seasons transition from the cold grip of winter to the emerging warmth of spring, the gradual dip in humidity hints at the changing climate. This pattern of elevated humidity persists throughout the year, particularly from April to July, when levels reach their highest, reminding residents and visitors alike of the region's lush, temperate environment. As October approaches, a further decrease to 83% is anticipated, suggesting a gradual shift toward drier conditions.
As September unfolds in Osorno, Chile, residents can expect a UV Index of 7, placing it in the high exposure category, with a burn time of approximately 25 minutes. Following a trend of decreasing UV levels from the summer months, this slight drop from August’s index signals a transition toward milder spring conditions. Notably, as the year progresses, Osorno experiences a consistent shift, with the UV Index peaking during the summer and easing to more moderate levels by autumn. This change serves as a reminder for both locals and visitors to remain vigilant about sun protection during their outdoor activities. For detailed information, you can explore more at Osorno UV Index.
UV Risk Categories
September in Osorno, Chile, offers a delightful transition into spring, with an impressive 241 hours of sunshine. This month marks a noticeable uptick in daylight compared to the preceding winter months, where hours dipped to a mere 137 in June and 160 in July. As the days grow longer, September's sunlight sets the stage for a vibrant transition, hinting at the bountiful spring ahead, which typically sees even more brightness—evident from the soaring 353 hours in December. October also benefits from this upward trend, showcasing 281 hours, while the overall pattern of decreasing sunlight from peak summer months in January (291 hours) to the winter months clearly highlights the unique charm of Osorno's late winter and early spring. Embrace September's warmth as it brings life and energy back to the landscape!
In Osorno, Chile, the likelihood of sunny weather trends upward as the year progresses. Starting off strong in the summer months with February boasting a 77% chance of sunshine, the sunny days gradually decline towards the fall. By September, the chance of sun dips to 38%, marking a transition to more overcast conditions as autumn approaches. This pattern suggests that while the springtime is not as bright as the peak summer months, there’s still a notable increase in sunshine compared to the dreary winter months of June and July, which languish around 26%. Overall, if you plan your visit in September, you can expect a mix of sun and clouds as the region transitions seasons.
In September, Osorno, Chile, experiences a notable shift in daylight duration as it transitions from the depths of winter to the promising warmth of spring. With 11 hours of daylight, the month serves as a gentle reminder of brighter days ahead, following the uniformity of 9 hours seen in the winter months from June to August. As the year progresses, the daylight hours begin to increase significantly, culminating in a delightful 15 hours by December. This gradual rise showcases not only the lengthening days but also the anticipation of longer, sun-filled afternoons that characterize the vibrant season ahead. Overall, September marks a crucial turning point where daylight starts to reclaim its dominance, setting the stage for the lively months to come.
As September arrives in Osorno, Chile, the winds begin to shift, ushering in the onset of spring. With an average wind speed of 2.5 m/s (6 mph), this month shows a subtle decrease compared to the breezier late winter months. Notably, August experienced a bit more vigor at 3.4 m/s (8 mph), creating a sharp contrast as the region transitions. This trend of gradually lessened winds continues into October, where speeds rise slightly to 2.9 m/s (7 mph), but the overall pattern suggests a gentler atmosphere settling in as the landscape awakens. This delicate balance of airflow mirrors the budding changes around Osorno, making September a time of transformation both in weather and environment.
Weather in Osorno varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Osorno, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is notably cooler, with temperatures ranging from a minimum of -2°C (30°F) to a maximum of 21°C (69°F) and an average of 8°C (47°F). This month sees significant rainfall, with a total of 126 mm (5.0 in) over about 13 days, contributing to a high humidity level of 85%. In contrast, January offers much warmer conditions, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 32°C (90°F) and an average of 15°C (60°F). January experiences considerably less precipitation, totaling only 31 mm (1.2 in) over about 5 days, and a slightly lower humidity of 81%. For a detailed outlook on Osorno's January weather, you can visit Osorno weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a chilly -2°C (30°F) at night to a mild 21°C (69°F) during the day, with an average of 8°C (47°F). This month receives significant precipitation, totaling 126 mm (5.0 in) over 13 days, coupled with high humidity at 85%. In contrast, February boasts much warmer temperatures, with minimums around 3°C (38°F) and maximums soaring up to 36°C (98°F), averaging at 16°C (61°F). The precipitation drops dramatically to just 28 mm (1.1 in) across 3 days, and humidity levels are slightly lower at 80%. For more detailed insights into February weather, you can check Osorno weather in February.
September and March present distinct weather characteristics. In September, temperatures range from a chilly minimum of -2°C (30°F) to a comfortable maximum of 21°C (69°F), with an average of 8°C (47°F). The month experiences significant precipitation, with 126 mm (5.0 in) spread over 13 days, contributing to a higher humidity level of 85%. In contrast, March enjoys a milder climate, with minimum temperatures starting at 2°C (36°F) and climbing to a pleasant maximum of 28°C (83°F), averaging 13°C (56°F). With only 72 mm (2.8 in) of precipitation over 7 days and a slightly lower humidity of 79%, March offers a drier and warmer environment. For more details on the weather during this month, you can visit Osorno weather in March.
In comparing the weather in September and April, September tends to be cooler with average temperatures peaking at 21°C (69°F) compared to April's warmer average of 11°C (52°F). The maximum temperatures in April can reach 24°C (76°F), providing a more pleasant experience than September's maximum of 21°C (69°F). Precipitation levels are relatively high in both months, with September receiving 126 mm (5.0 in) over 13 days, while April has slightly less at 105 mm (4.1 in) over 12 days. Humidity levels are fairly similar, with September at 85% and April at 84%. For more detailed information, you can check out Osorno weather in April.
In comparing the weather between September and May, both months exhibit similar temperature ranges, with minimums around -2°C and average highs peaking at around 20-21°C. However, September enjoys slightly milder average temperatures, with an average of 8°C compared to May's 9°C. Precipitation is notably higher in May, totaling 167 mm over 17 days, compared to September's 126 mm over 13 days, indicating a wetter climate in late spring. Additionally, humidity levels remain high in both months, with May just edging out September at 86% versus 85%. For more detailed insights on May’s weather, visit Osorno weather in May.
When comparing the weather in September and June, September generally offers milder temperatures with a minimum of -2°C (30°F) and an average of 8°C (47°F), reaching a maximum of 21°C (69°F). In contrast, June experiences slightly cooler temperatures, with a minimum of -4°C (25°F) and a maximum of just 15°C (59°F). Rainfall is notably higher in June, accumulating to 252 mm (9.9 in) over 21 days, compared to September's 126 mm (5.0 in) across 13 days. Both months experience high humidity levels, with September at 85% and June slightly higher at 86%. For more detailed insights, you can check Osorno weather in June.
In comparing the weather between September and July, September offers a broader temperature range, with minimums reaching -2°C (30°F) and maximums soaring to 21°C (69°F), while July sees lower temperatures, with a maximum of just 14°C (58°F) and a minimum of -3°C (26°F). Although September experiences slightly less precipitation with 126 mm (5.0 in) over 13 days compared to July's 197 mm (7.7 in) across 18 days, the humidity remains relatively high in both months, at 85% in September and 87% in July. These conditions indicate that while September is warmer and somewhat drier, July remains cooler and wetter, which can impact outdoor activities. For more detailed insights into July’s weather, visit Osorno weather in July.
In comparing the weather of September and August, September tends to be milder with a higher average temperature of 8°C (47°F) compared to August's 7°C (45°F). Although both months experience cold minimum temperatures around -2°C (30°F), September sees a warmer maximum temperature of 21°C (69°F) versus August's peak of 16°C (61°F). Precipitation in September is also notably less, with 126 mm (5.0 in) falling over 13 days, compared to 238 mm (9.4 in) over 20 days in August. Humidity levels are slightly lower in September at 85% compared to August’s 87%. For more detailed information, you can check Osorno weather in August.
September and October present a gradual transition in weather patterns. In September, temperatures range from a chilly -2°C (30°F) at night to a comfortable 21°C (69°F) during the day, with an average of 8°C (47°F). This month sees substantial rainfall, accumulating to 126 mm (5.0 in) over 13 rainy days, alongside high humidity levels at 85%.
By October, the temperatures begin to rise slightly, with nighttime lows of -1°C (31°F) and daytime highs reaching up to 23°C (73°F), averaging 10°C (49°F). Precipitation remains similar, totaling 121 mm (4.8 in) and occurring over 14 days, but humidity decreases slightly to 83%. This shift marks a gradual move towards slightly milder and more stable weather. For more details, visit Osorno weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a chilly minimum of -2°C (30°F) to a maximum of 21°C (69°F), with an average of 8°C (47°F). It experiences considerable precipitation, totaling 126 mm (5.0 in) over about 13 days, and the humidity is relatively high at 85%. In contrast, November sees milder temperatures, with a minimum of 1°C (34°F) and a maximum of 25°C (76°F), leading to a higher average of 12°C (54°F). The precipitation decreases to 81 mm (3.2 in) over 10 days, and humidity drops slightly to 80%. For more detailed information, you can check Osorno weather in November.
In September, the weather is quite cool and variable, with temperatures ranging from a low of -2°C (30°F) to a high of 21°C (69°F) and an average of 8°C (47°F). The month sees considerable precipitation, totaling 126 mm (5.0 in) over 13 days, accompanied by high humidity levels at 85%. In contrast, December brings warmer weather, with temperatures between 3°C (38°F) and 29°C (85°F), averaging 14°C (58°F). Precipitation decreases significantly to 53 mm (2.1 in) over just 7 days, and humidity drops slightly to 82%. For a closer look at the December weather in Osorno, check this link: Osorno weather in December.
As September unfolds in Osorno, the weather begins to shift significantly from the chill of winter, bringing a refreshing transition into spring. With temperatures averaging a cool 8°C yet reaching a pleasant high of 21°C, this month showcases a wider range of weather than many of its predecessors. However, the potential for inclement weather looms with approximately 126 mm of rainfall spread over 13 days, contributing to a notably high humidity level of 85%. This combination of warmth and moisture creates a vibrant backdrop for the blooming landscape, setting Osorno apart from the drier, colder months that precede it. For a comprehensive look at what to expect throughout the year, explore the detailed insights available at Osorno Climate.