Last updated: August 21, 2025
In Puerto Montt, Chile, September ushers in the arrival of spring with an average temperature of 9°C (48°F), offering mild days contrasted by cooler nights with a minimum of 2°C (35°F). The city experiences maximum temperatures reaching up to 19°C (66°F), making it an ideal time for outdoor activities. However, visitors should prepare for rain, as 173 mm (6.8 in) of precipitation is recorded over 17 days, resulting in a humid atmosphere with a humidity level of 85%. This blend of mild temperatures and frequent showers paints a vivid picture of early spring in Puerto Montt, inviting both adventure and relaxation.
In September, the temperatures in Puerto Montt, Chile start to hint at the transition from the chill of winter to the mildness of spring. The month sees a minimum of around 2°C (35°F), gradually warming up to an average of 9°C (48°F) and reaching a modest maximum of 19°C (66°F). This pattern reflects a subtle upward trend from the colder months of July and August, where temperatures hovered between 0°C (32°F) and 15°C (59°F). As September unfolds, the days become longer and the air carries a promise of renewal, inviting both locals and visitors to embrace the burgeoning beauty of the region.
In September, Puerto Montt experiences a notable shift in weather patterns as the rainfall begins to taper off from the peak winter months. With 173 mm (6.8 in) of precipitation falling across 17 days, this month marks a transition towards drier conditions compared to the heavy rainfall seen in May and June, which each recorded substantial amounts exceeding 270 mm. The trend shows a gradual reduction in precipitation as the region approaches the warmer months, supporting the coastal city's reputation for diverse weather. Notably, September's rainfall is significantly less than the previous months, but it still contributes to the lush vibrancy characteristic of this scenic area in southern Chile. As the days begin to lengthen, the dynamic interplay between water and light fosters a unique atmosphere, preparing the land for the drier and brighter days ahead.
In September, the humidity in Puerto Montt, Chile slightly eases to 85%, following a summer of consistently high moisture levels. This month marks a subtle decline from the peak levels observed in winter, where humidity hovered around 87% in both July and August. As autumn approaches, humidity typically stabilizes, dipping slightly but remaining elevated compared to the earlier months of the year. Overall, the trend reveals a gradual increase in humidity from the beginning of the year, peaking in the middle months, and then tapering off as the seasons transition, creating a unique climate characterized by its rich moisture throughout the year.
In September, Puerto Montt experiences a UV Index of 6, classified as high, with an estimated burn time of 25 minutes. This marks a slight increase from the mid-winter months of June and July, where the index dipped to lower levels. As spring approaches, the UV levels begin to rise, indicating that exposure precautions should still be considered. While the UV Index remains manageable, it’s a reminder of the transitioning seasons and the importance of protecting your skin as you enjoy the emerging sunshine. For more detailed information, visit Puerto Montt UV Index.
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As the chill of winter recedes, September in Puerto Montt, Chile, welcomes a resurgence of sunshine, basking in 237 hours of bright daylight. This month serves as a delightful transition, showcasing a gradual uptick from the cooler, gloomier months of June and July, which recorded only 134 and 164 hours of sunshine, respectively. Following September, the sun continues to shine more brightly, with October and November enjoying 266 and 285 hours. The gentle increase in sunlight not only enhances the charm of this coastal city but also signals the approach of the warmer months, inviting residents and visitors alike to embrace the vibrant spirit of spring.
In Puerto Montt, Chile, the likelihood of sunny weather in September hovers around 32%, a moderate increase compared to the damp winter months of July and August, where sunshine chances plummet to 22% and 19%, respectively. As the region transitions from the cold depths of winter, September begins to hint at spring's arrival, although it still lags behind the sunnier summer months, like February with its impressive 63% chance of sun. This gradual uptick is part of a broader trend where sunny days become more frequent leading into the warmer months, particularly from September through to December, suggesting that while September still holds on to some rainy tendencies, the allure of clearer skies is just around the corner.
As September unfolds in Puerto Montt, Chile, the days begin to lengthen, offering a refreshing glimpse of the approaching spring. With approximately 11 hours of daylight, this month marks a slight increase from the shorter days of winter. Following the winter months of 9 hours, September showcases a transition, hinting at the more generous light of October with its 13 hours of daylight. This gradual shift highlights the region's dynamic seasonal patterns, where daylight begins to bloom as nature awakens, inviting both locals and visitors to embrace the vibrant changes of the landscape. The progression from the dimmer days of winter towards the more luminous landscapes of spring makes September a beautiful time to explore the natural beauty that surrounds this picturesque coastal city.
In September, the winds in Puerto Montt, Chile, tend to calm after the breezier months of August and June, with an average speed of 3.1 m/s (7 mph). This gentle shift marks a transition into the spring season, while the preceding months showcased wind speeds peaking at 4.2 m/s, signaling a robust airflow during winter. As autumn approaches, the consistent patterns of earlier months indicate that while the winds may ease, they remain a vital part of Puerto Montt's dynamic climate. This comforting calm creates a serene atmosphere that invites outdoor exploration and connection with the stunning natural surroundings.
Weather in Puerto Montt varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Puerto Montt, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Puerto Montt is characterized by cooler temperatures, with a minimum of 2°C (35°F) and an average of 9°C (48°F), peaking at 19°C (66°F). This month also sees significant rainfall, totaling 173 mm (6.8 in) spread over 17 days, along with a high humidity level of 85%. In contrast, January offers warmer temperatures, with a minimum of 5°C (42°F), an average of 14°C (58°F), and a maximum of 25°C (77°F). Precipitation is reduced to 82 mm (3.2 in) over just 10 days, while humidity slightly drops to 81%. For more detailed information, check out Puerto Montt weather in January.
September and February present quite contrasting weather patterns. In September, temperatures vary from a chilly minimum of 2°C (35°F) to a milder maximum of 19°C (66°F), with an average of 9°C (48°F). The month is characterized by high humidity at 85% and considerable rainfall, totaling 173 mm (6.8 in) over 17 days. In contrast, February warms up significantly, featuring a minimum of 7°C (44°F) and soaring to a maximum of 32°C (90°F), with an average temperature of 15°C (59°F). The precipitation drops to 70 mm (2.7 in) across just 7 days, and the humidity is slightly lower at 80%. For further details, you can check out Puerto Montt weather in February.
When comparing the weather in September and March, we notice distinct differences in temperature and precipitation patterns. September typically experiences cooler temperatures, with an average of 9°C (48°F) and a maximum of 19°C (66°F), while March sees milder conditions, with an average of 13°C (56°F) and highs reaching 25°C (76°F). In terms of precipitation, September receives more rainfall, totaling 173 mm (6.8 in) over 17 days, compared to March's 128 mm (5.0 in) over just 12 days. Additionally, humidity levels are slightly higher in September at 85%, while March maintains a comfortable 79%. For a deeper look into the weather specifics of March, you can visit Puerto Montt weather in March.
When comparing the weather in September and April, both months share similar minimum temperatures, hovering around 2°C (35°F - 36°F). However, April features a higher average temperature of 12°C (53°F) compared to September's 9°C (48°F), and a warmer maximum of 21°C (70°F) versus 19°C (66°F) in September. Despite April having slightly more precipitation at 181 mm (7.1 in) over 14 days, September's 173 mm (6.8 in) spread across 17 days creates a slightly longer stretch of rainy weather. Humidity levels are quite comparable, remaining high in both months, with September at 85% and April at 84%. For a more detailed look at how April weather specifically affects the region, you can check Puerto Montt weather in April.
When comparing the weather between September and May, we see both similarities and differences. Both months feature a maximum temperature of around 19°C (66°F), but September enjoys slightly warmer average temperatures, peaking at 9°C (48°F) compared to May's 10°C (50°F). However, May experiences significantly more precipitation, with 278 mm (11.0 in) over 19 days, while September has 173 mm (6.8 in) over 17 days. Interestingly, the humidity levels in both months are quite similar, hovering around 85-86%. For a detailed look at May's weather in Puerto Montt, you can check Puerto Montt weather in May.
In comparing the weather of September and June, September tends to be slightly warmer, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 19°C (66°F), averaging around 9°C (48°F). In contrast, June experiences cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 15°C (59°F), averaging 8°C (47°F). While September receives 173 mm (6.8 in) of precipitation over 17 days, June is notably wetter, with 337 mm (13.3 in) of rainfall spread across 22 days. Both months exhibit high humidity levels, with September at 85% and June at 86%. For more detailed information, you can refer to Puerto Montt weather in June.
When comparing the weather in September and July, it’s clear that September tends to be warmer, with a minimum temperature of 2°C (35°F) and an average of 9°C (48°F) compared to July's minimum of 0°C (31°F) and an average of 7°C (46°F). September also enjoys a higher maximum temperature, reaching up to 19°C (66°F), whereas July peaks at 14°C (57°F). However, July sees more precipitation overall, with 240 mm (9.4 in) over 20 days, compared to September's 173 mm (6.8 in) spread across 17 days. Both months are marked by high humidity, with July at 87% and September slightly lower at 85%. For more details on July's weather, you can check Puerto Montt weather in July.
September generally sees milder temperatures compared to August, with a minimum of 2°C (35°F) and a maximum of 19°C (66°F), whereas August experiences slightly cooler conditions, with minimums dropping to 0°C (33°F) and maximums capped at 15°C (59°F). Although September offers better average temperatures at 9°C (48°F) compared to August's average of 8°C (46°F), it also experiences more precipitation, totaling 173 mm (6.8 in) over 17 days, compared to August's 295 mm (11.6 in) over 22 days. Humidity levels remain high in both months, with September at 85% and August slightly higher at 87%. For a detailed look at August’s weather, visit Puerto Montt weather in August.
Comparing the weather in September and October reveals some notable differences. Both months have similar temperature ranges, with September averaging 9°C (48°F) and October slightly warmer at 10°C (50°F). However, October sees a slight increase in precipitation, totaling 191 mm (7.5 in) over 19 days compared to September's 173 mm (6.8 in) over 17 days. Humidity levels also remain high, with September at 85% and October slightly lower at 83%. For a more detailed look at the conditions, you can check Puerto Montt weather in October.
In comparing the weather of September and November, September tends to be cooler with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 19°C (66°F), while November sees slightly milder conditions, with minimums of 3°C (38°F) and maximums reaching 22°C (72°F). Precipitation is relatively similar between the two months, with September receiving 173 mm (6.8 in) over 17 days, while November experiences 156 mm (6.2 in) across 15 days. Additionally, humidity levels are marginally higher in September at 85%, compared to 80% in November. For a detailed look at the climate during this month, you can visit Puerto Montt weather in November.
In comparing the weather between September and December, notable differences emerge in both temperature and precipitation. September sees cooler temperatures with a minimum of 2°C (35°F), averaging 9°C (48°F), and peaking at 19°C (66°F). This month also experiences substantial rainfall, totaling 173 mm (6.8 in) over 17 days, with humidity hovering around 85%. In contrast, December brings a milder climate, with minimum temperatures rising to 6°C (44°F), averaging 14°C (57°F), and reaching a maximum of 23°C (73°F). Precipitation is less frequent and lighter, amounting to 121 mm (4.8 in) over just 12 days, accompanied by a slightly lower humidity of 82%. For more detailed weather information, you can visit Puerto Montt weather in December.
As September rolls in, Puerto Montt experiences a noticeable shift in weather patterns, marking the transition from winter's chill to the early warmth of spring. While temperatures gradually warm up, averaging around 9°C, the month is still characterized by significant rainfall, with 173 mm of precipitation over approximately 17 days. This high humidity level of 85% makes the air feel damp and brisk, distinguishing September from the drier and warmer summer months ahead. Visitors and residents alike should be prepared for sudden showers, which are common during this time. For a comprehensive understanding of what to expect throughout the year, check out Puerto Montt Climate.