September Weather in Punta Arenas, Chile

Last updated: August 21, 2025

In Punta Arenas, Chile, September ushers in the arrival of spring with a mix of brisk temperatures and notable precipitation. On average, daily temperatures hover around 4°C (40°F), with highs reaching up to 12°C (54°F) and lows dipping to -2°C (29°F). This month experiences significant rainfall, accumulating to 61 mm (2.4 in) over 16 days, contributing to an overall humidity level of 87%. Visitors can expect a dynamic weather pattern, making September an ideal time to enjoy the unique beauty of this southernmost city as it transitions into the warmer months.

September Temperature in Punta Arenas

In September, Punta Arenas, Chile, begins to shed the chill of winter, with temperatures slowly on the rise. The month sees a minimum of -2°C (29°F) and an average temperature of 4°C (40°F), making it a transitional period as the region gears up for spring. While highs reach a modest 12°C (54°F), this represents a noticeable shift from the frigid temperatures experienced in the previous months. As summer approaches, the gradual warming trend becomes evident, hinting at longer days and the vibrant renewal of the landscapes characteristic of this southernmost city. September in Punta Arenas marks not just a change in temperature, but also a herald of the lively season to come.

September Weather in Punta Arenas: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Punta Arenas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Punta Arenas, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec495048444136353740424648
Data source: Temperature data for Punta Arenas generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Punta Arenas

As September arrives in Punta Arenas, Chile, the city experiences a moderate dip in precipitation, with 61 mm (2.4 in) of rain falling over 16 days. This marks a contrast to the wetter months that precede it, particularly April, which sees the highest rainfall at 101 mm (4.0 in), and March, which closely follows with 98 mm (3.8 in). The trend in September suggests a gradual transition into spring, as temperatures begin to rise and the frequency of rainy days remains fairly consistent with the previous month. Looking ahead, October ushers in a slight increase in rainfall to 83 mm (3.3 in), hinting at a season characterized by variability and a blend of refreshing showers. Overall, September serves as a bridge between the colder winter months and the forthcoming warmth of spring, reaffirming Punta Arenas' climate as dynamic and ever-changing.

September Precipitation Trends in Punta Arenas

The chart displays monthly precipitation patterns in Punta Arenas, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Punta Arenas, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec88729810170556781618393104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Punta Arenas

In September, Punta Arenas experiences a notable shift in humidity, settling at 87%. This level signifies a slight decrease from the peak of 92% seen in the winter months of June and July. The trend suggests that as spring approaches, the air begins to lose some of its moisture, yet the humidity remains relatively high compared to earlier months. Following September, humidity continues to gradually decline, reaching 86% in October and further decreasing throughout the spring. This consistent high humidity, particularly during the winter months, is a hallmark of the region's climate, hinting at the interplay between oceanic influences and seasonal changes.

September Average Humidity in Punta Arenas

This chart illustrates the average monthly humidity levels in Punta Arenas, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Punta Arenas is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%86%87%89%90%92%92%89%87%86%84%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Punta Arenas

As September arrives in Punta Arenas, Chile, the UV Index begins a gradual ascent, reflecting the transition to longer, sunnier days. This month, the UV Index reaches 4, falling under the moderate exposure category, with a notable burn time of 30 minutes. This increase follows the low values of winter months, where the UV Index remained at 1 for a couple of months, and marks a shift from the previous 3 in August. As temperatures rise and daylight extends, it’s essential to be mindful of sun exposure. Those eager to enjoy the outdoors should remember to take precautions, particularly as the UV Index is set to climb even higher in the coming months. For a deeper dive into the UV Index trends and details, visit Punta Arenas UV Index.

Maximum UV Index Levels in Punta Arenas for September

The chart shows the monthly maximum UV Index (UVI) for Punta Arenas in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Punta Arenas typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec119632113481210
Data source: Punta Arenas September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Punta Arenas

As September rolls around in Punta Arenas, Chile, the city basks in a delightful 169 hours of sunshine, marking a pleasant transition as spring begins to unfold. This month signifies a shift from the cooler winter days, as the hours of sunlight gradually increase from the previous month. Following a pattern of rising daylight, September's sunny embrace sets the stage for an impressive peak in October and November, where sunshine expands dramatically to 208 and 240 hours, respectively. This seasonal upward trend not only heralds warmer weather but also invites outdoor adventures and vibrant flora, making Punta Arenas a captivating destination for both locals and travelers alike.

Monthly Sunshine Duration in Punta Arenas: September Highlighted

The September sunshine duration represents the total number of hours Punta Arenas experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec195h195h177h147h105h102h110h150h169h208h240h242h
Data source: Punta Arenas September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Punta Arenas During September

In Punta Arenas, Chile, the likelihood of experiencing sunny weather in September hovers around 29%, making it a moderately bright month in comparison to the colder winter months. While January and February boast a modest 25% chance, September shows a slight increase, closely aligning with the sunnier conditions of August at 31%. This trend indicates a gradual transition towards clearer skies as spring approaches. After September, the chance of sunshine remains fairly steady, fluctuating between 28% and 30% through the latter months of the year. As such, visitors can anticipate an inviting mix of sun and clouds, setting the stage for the vivid landscapes of this captivating region.

Percentage of Sunny Days in September in Punta Arenas

The chart illustrates the percentage of sunny days in Punta Arenas throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Punta Arenas experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec25%25%31%26%28%23%25%31%29%28%30%30%
Data source: Punta Arenas September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Punta Arenas in September

As September rolls around in Punta Arenas, Chile, the days begin to lengthen once again, with a daylight duration of 11 hours. This marks a subtle yet significant increase from the 8 hours seen in May and June, heralding the arrival of spring in the Southern Hemisphere. In this transitional month, the lingering winter chill gives way to brighter skies, paving the way for the 12 hours of daylight will soon light up October. The gradual shift in daylight duration highlights a rhythmic pattern typical of the region, where winter's shorter days make way for the prolonged daylight that characterizes the warmer months, ultimately culminating in the summer months of January and February, where sunshine reigns supreme for up to 16 hours.

Average Daylight Hours in Punta Arenas for September

The chart illustrates the variation in daylight duration in Punta Arenas throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec16h 15m14h 30m12h 24m10h 18m8h 31m7h 35m8h 6m9h 42m11h 43m13h 50m15h 46m16h 50m
Data source: Punta Arenas daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Punta Arenas

As September arrives in Punta Arenas, Chile, the wind begins to pick up, with average speeds reaching 5.7 m/s (13 mph). While this is a slight increase from the calmer months of mid-winter, it remains lower than the gusty conditions that will follow later in the year, especially in October when speeds rise to 7.5 m/s (17 mph). This transitional period reflects a gradual shift from the cool stillness of winter to the more spirited winds of spring. The overall trend shows a notable dip in wind intensity from January through June, followed by a rebound starting in July, illustrating nature's rhythmic dance as the seasons change. September serves as a breath of fresh air, bridging the quieter months and the blustery ones that lie just around the corner.

Average September Wind Speed in Punta Arenas

The chart displays monthly wind speed patterns in Punta Arenas, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.76.16.64.94.74.15.55.65.7 m/s7.57.06.8
Data source: Punta Arenas September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Punta Arenas Compares to Other Months

Weather in Punta Arenas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Punta Arenas, focusing on differences in temperature, rainfall, humidity, and UV levels.

In September, Punta Arenas experiences cooler temperatures with a minimum of -2°C (29°F) and an average of 4°C (40°F), while January offers much milder conditions with a minimum of 3°C (38°F) and an average of 9°C (49°F). The maximum temperature in September reaches only 12°C (54°F), significantly lower than January’s warmer peak of 21°C (71°F). September also sees more precipitation, averaging 61 mm (2.4 in) over 16 days, compared to January’s 88 mm (3.5 in) over 20 days, albeit with slightly lower humidity levels of 87% in September versus 83% in January. For a detailed look at the conditions in January, visit Punta Arenas weather in January.

September and February present contrasting weather patterns in Punta Arenas. In September, temperatures are cooler, with a minimum of -2°C (29°F) and an average of 4°C (40°F), peaking at 12°C (54°F). The month experiences notable precipitation, totaling 61 mm (2.4 in) over 16 days, coupled with high humidity at 87%. In contrast, February sees milder temperatures, ranging from a minimum of 2°C (37°F) to a maximum of 24°C (75°F) with an average of 10°C (50°F). Precipitation slightly increases to 72 mm (2.8 in) across the same 16 days, while humidity remains relatively stable at 86%. For more detailed information, check out Punta Arenas weather in February.

When comparing the weather in September and March, a noticeable shift occurs in temperature and precipitation patterns. In September, temperatures range from a chilly minimum of -2°C (29°F) to a maximum of 12°C (54°F), with an average of 4°C (40°F). In contrast, March sees milder temperatures, with a minimum of 1°C (35°F) and a maximum of 18°C (65°F), averaging around 9°C (48°F). Additionally, March experiences more precipitation, totaling 98 mm (3.8 in) over 19 days, compared to September's 61 mm (2.4 in) over 16 days, while humidity remains consistently high at 87% for both months. For more detailed information, you can check this link: Punta Arenas weather in March.

September and April exhibit notable differences in weather, reflecting the transition between seasons. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 12°C (54°F), with an average of 4°C (40°F). The month sees about 61 mm (2.4 in) of precipitation over 16 days, accompanied by a high humidity of 87%. In contrast, April offers warmer conditions, with minimum temperatures also at -2°C (28°F) but rising to a maximum of 17°C (64°F) and an average of 6°C (44°F). Precipitation increases to 101 mm (4.0 in), although it still falls over the same number of days. The humidity remains similar at 89%, slightly higher than in September. For a detailed look at April weather specifics, you can check Punta Arenas weather in April.

When comparing the weather in September and May, we notice only slight variations in temperature and precipitation. September sees a minimum temperature of -2°C (29°F) and an average of 4°C (40°F), while May has a slightly colder minimum of -3°C (27°F) but an average just a degree higher at 5°C (41°F). Both months reach similar maximum temperatures of about 12°C (54°F in September and 55°F in May). Precipitation is more frequent in September, with 61 mm (2.4 in) over 16 days, compared to May's 70 mm (2.8 in) spread over 13 days. Humidity levels are also quite comparable, with September at 87% and May a touch higher at 90%. For a detailed look at May weather, check out Punta Arenas weather in May.

September and June present noticeably different weather conditions. In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 12°C (54°F), with an average of 4°C (40°F), making it slightly warmer than June. In contrast, June experiences a lower temperature range, with minimums of -8°C (18°F) and maximums of 9°C (49°F), averaging 2°C (36°F). Precipitation levels are somewhat similar, with September receiving 61 mm (2.4 in) over 16 days and June slightly less at 55 mm (2.2 in) across 15 days. Humidity is also higher in June at 92%, compared to 87% in September, suggesting that June may feel even colder due to the dampness. For more detailed insights, you can explore Punta Arenas weather in June.

In comparing the weather of September and July, September generally offers slightly milder temperatures, with an average of 4°C (40°F) compared to July's average of 2°C (35°F). July experiences lower minimum temperatures, dipping down to -9°C (17°F) versus September's minimum of -2°C (29°F). Both months see significant precipitation, with September receiving 61 mm (2.4 in) over 16 days and July just slightly higher at 67 mm (2.6 in) across 15 days. Humidity levels are also notably high in both months, with September at 87% and July at 92%. For a more in-depth look at July weather, you can refer to Punta Arenas weather in July.

In September, the weather in Punta Arenas shows a slight improvement compared to August, with an average temperature rising to 4°C (40°F) and a maximum of 12°C (54°F), while in August, the average was 3°C (37°F) with a maximum of 11°C (52°F). Precipitation in September decreases slightly to 61 mm (2.4 in) over 16 days, compared to 81 mm (3.2 in) over 18 days in August. Humidity remains relatively high in both months, with September at 87% and August at 89%. For more detailed information, you can visit Punta Arenas weather in August.

September and October in Punta Arenas exhibit a subtle transition in weather patterns. September's temperatures range from a minimum of -2°C (29°F) to a maximum of 12°C (54°F), with an average of 4°C (40°F). In contrast, October warms slightly, with average temperatures rising to 6°C (42°F) and daytime highs reaching up to 14°C (58°F). Precipitation increases from 61 mm (2.4 in) over 16 days in September to 83 mm (3.3 in) across 19 days in October, while humidity remains relatively similar, at 87% in September compared to 86% in October. For more details on October's weather, you can refer to Punta Arenas weather in October.

September and November exhibit distinct weather patterns, reflecting the transition from early spring to late spring in Punta Arenas. In September, temperatures range from a chilly -2°C (29°F) at night to a mild 12°C (54°F) during the day, with an average of 4°C (40°F). This month sees 61 mm (2.4 in) of precipitation over 16 days and high humidity at 87%. In contrast, November brings warmer temperatures, with nighttime lows at 0°C (32°F) and daytime highs reaching up to 18°C (65°F), averaging around 8°C (46°F). Precipitation increases to 93 mm (3.7 in) across 18 days, while humidity slightly decreases to 84%. This comparison highlights a trend toward milder weather as spring progresses. For more detailed insights on weather conditions, you can check Punta Arenas weather in November.

The weather in September and December shows a notable shift in temperatures and precipitation patterns. September experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 4°C (40°F), while December sees milder conditions, with a minimum of 1°C (34°F) and an average of 9°C (49°F). Precipitation also increases from 61 mm (2.4 in) over 16 days in September to 104 mm (4.1 in) across 22 days in December, indicating a wetter end to the year. Despite December's higher humidity of 84%, it remains slightly lower than September's 87%, contributing to a more comfortable atmosphere during the latter month. For a detailed look at December weather, you can visit Punta Arenas weather in December.

Compare Punta Arenas's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Punta Arenas

As September unfolds in Punta Arenas, the transition from winter to spring becomes palpable, marked by milder temperatures compared to the preceding months. With a minimum dipping to -2°C and an average hovering around 4°C, the region begins to thaw and awaken from its chilly slumber. However, visitors should be prepared for frequent precipitation, as the month sees rain on 16 days, contributing to a relatively high humidity level of 87%. This blend of cool, damp weather sets September apart from the more stable conditions of the summer months, offering a unique glimpse into the evolving climate of this southernmost destination. For a deeper dive into the climate dynamics of Punta Arenas, check out Punta Arenas Climate.