Last updated: August 21, 2025
In September, La Union, Chile, experiences a dynamic transition into spring, marked by a temperature range that spans from a chilly minimum of -2°C (29°F) to a pleasant maximum of 21°C (71°F). The average temperature hovers around a cool 8°C (47°F), making it an invigorating time for outdoor activities. However, precipitation is notable, with 118 mm (4.6 in) of rain falling over approximately 13 days, contributing to the region's lush and vibrant landscapes. With an humidity level reaching 85%, the air is often crisp, enriching the overall charm of this picturesque locale during the early spring months.
In September, La Union, Chile begins to shake off the chill of winter, boasting a minimum temperature of -2°C (29°F) and a pleasant average of 8°C (47°F). The city experiences a gradual warming trend as it transitions into spring, with daytime highs reaching up to 21°C (71°F). This change is marked by brighter days and the anticipation of blooming landscapes, setting the stage for a vibrant month ahead. Compared to the preceding months, September brings a notable shift, as temperatures steadily rise from the lower averages seen in July and August. This mild weather not only encourages outdoor activities but also welcomes the arrival of a fresh, lively atmosphere.
September in La Union, Chile, marks a significant transition in precipitation patterns as the region experiences 118 mm (4.6 in) of rainfall over approximately 13 days. This amount continues the trend of increased precipitation observed from May through August, where rainfall peaked at 256 mm in June. However, by September, there's a noticeable reduction compared to the preceding months, signaling the tail end of the most intense rainy season. As the days grow shorter and cooler, the frequency of rainfall begins to decline, yet the lingering wet conditions highlight the region's dynamic climate. This shift prepares La Union for the drier months ahead, with October expected to see a similar but slightly lower precipitation total.
In September, La Union, Chile, experiences a notable humidity level of 85%, showcasing a slight decrease from the peak months of July and August, which both register at 87%. This transitional month marks the beginning of a gradual decline in humidity as it heads into the spring season, following April and May’s higher averages of 84% and 86%, respectively. Overall, while September's humidity remains relatively high, it indicates the shift in climatic patterns that characterizes this coastal region, as it begins to embrace the lighter, fresher conditions of the upcoming months.
As September arrives in La Union, Chile, the UV Index sees a notable rise, reaching 7, which falls into the high exposure category with a burn time of just 25 minutes. This marks a transition from the relatively lower indices of winter months, where protection was less urgent. September's sun gradually intensifies, hinting at the approach of summer months ahead. With the UV levels set to climb higher in the coming months, it’s essential to stay informed and take the necessary precautions to protect your skin. Stay safe and plan your sun exposure wisely! For more detailed information, visit La Union UV Index.
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As September unfolds in La Union, Chile, visitors can bask in 241 hours of glorious sunshine, marking a delightful transition from the cooler winter months. This amount of sunlight not only signifies a significant increase from the dreary 185 hours seen in May but also sets the stage for the brighter days of early summer. With October promising even 281 hours of radiant sun, it’s clear that September serves as a refreshing prelude to the sun-soaked months ahead. This upward trend from the winter months invites nature lovers and sun-seekers alike to enjoy outdoor adventures against the backdrop of Chile's stunning landscapes. As days grow longer and warmer, the vibrant energy of spring invigorates the region, making September an ideal time to embrace both relaxation and exploration.
In La Union, Chile, September marks the transition from winter to spring, bringing a 39% chance of sunny weather. While this figure demonstrates some improvement compared to the previous winter months, which hover below 30%, it still reflects a modest likelihood of clear skies. As the sun begins to re-emerge, the chances of sunshine will steadily rise in the following months, peaking in the summer with February's impressive 76%. This trend showcases a gradual shift towards brighter days, making September a hopeful month for those anticipating the arrival of spring warmth.
In La Union, Chile, the rhythm of daylight unfolds gracefully throughout the year. As the seasons shift, September brings a noticeable increase in sunlight, with 11 hours of daylight, a gentle rise from the darker winter months of June, July, and August, which see just 9 hours each. This transition signals the approaching warmth of spring, as the days steadily lengthen. Following September, daylight durations bounce back further, reaching 13 hours in October and maintaining that vitality through November and December, when the sun graces the landscape for 14 hours. This trend of expanding daylight not only marks the changing seasons but also invites opportunities for outdoor adventures and exploration during the beautiful transition toward summer.
As September ushers in the early days of spring in La Union, Chile, the average wind speed settles at a mild 2.5 m/s (6 mph), a slight dip from the preceding months. This season typically features a gentle breeze, reminiscent of the soft winds observed in July and April. Interestingly, after the invigorating winds of August, which peak at 3.3 m/s (7 mph), September's calmer conditions mark a transition into a more gentle period. This month creates an inviting atmosphere for outdoor activities, as the winds remain manageable while still contributing to the vibrant feel of the Chilean coast. Looking ahead, October is expected to see a slight uptick to 2.8 m/s (6 mph), maintaining the overall trend of subtle wind fluctuations as the year progresses.
Weather in La Union varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Union, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, it's clear that both months present distinct climatic characteristics. September experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (47°F), while January enjoys warmer temperatures, featuring a minimum of 2°C (35°F) and an average of 16°C (60°F). Additionally, September has significantly higher precipitation, recording 118 mm (4.6 in) over 13 days, contrasting sharply with January's 27 mm (1.1 in) across just 5 days. Humidity levels are fairly similar, with September at 85% and January slightly lower at 81%. For a more detailed look at January weather patterns in La Union, you can check La Union weather in January.
September and February present notably different weather patterns. September experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (47°F), peaking at a comfortable 21°C (71°F). In comparison, February boasts much warmer conditions, with temperatures ranging from a minimum of 4°C (39°F) to a scorching maximum of 37°C (98°F) and an average of 17°C (62°F). Precipitation is more frequent in September, with 118 mm (4.6 in) over 13 days, while February sees significantly less rain, totaling only 29 mm (1.1 in) across just 4 days. The humidity remains relatively high in both months, just slightly lower in February at 80% compared to September's 85%. For a more detailed look at February weather, you can explore La Union weather in February.
When comparing the weather in September and March, notable differences emerge. September experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (47°F), while March boasts a warmer range, starting at 2°C (36°F) and reaching an average of 14°C (57°F). Additionally, March can see warmer maximum temperatures up to 30°C (85°F), in stark contrast to September’s peak of 21°C (71°F). Precipitation levels also differ, as September receives 118 mm (4.6 in) over approximately 13 rainy days, whereas March has only 75 mm (2.9 in) spread over about 7 days. Humidity in September is higher at 85%, compared to March's 79%. For a detailed look at March weather, visit La Union weather in March.
September and April exhibit distinct weather characteristics. In September, temperatures range from a chilly -2°C (29°F) to a mild 21°C (71°F), with an average temperature of 8°C (47°F). The month sees considerable precipitation, with around 118 mm (4.6 in) falling over 13 days, contributing to a relatively high humidity of 85%. In contrast, April offers slightly warmer conditions, with temperatures ranging from -1°C (31°F) to a peak of 25°C (77°F), and an average of 11°C (53°F). Precipitation is somewhat less at 98 mm (3.9 in) over 12 days, while humidity is a touch lower at 84%. For a detailed look at what to expect, check out La Union weather in April.
September and May present similar temperature ranges, with average highs hovering around 21°C (71°F). However, September tends to be slightly milder at an average of 8°C (47°F) compared to May's 9°C (48°F). Notably, May experiences more precipitation, with 157 mm (6.2 in) falling over 17 days, while September has 118 mm (4.6 in) over 13 days. The humidity levels are quite comparable, with September at 85% and May slightly higher at 86%. For a closer look at May's weather specifics, you can visit La Union weather in May.
In September, the weather in La Union features a broader temperature range with minimums around -2°C (29°F) and maximums reaching 21°C (71°F), compared to June's cooler temperatures that range from -4°C (25°F) to a maximum of 15°C (60°F). While September averages a milder 8°C (47°F), June's average is slightly lower at 7°C (45°F). Rainfall also differs significantly, as September sees 118 mm (4.6 in) of precipitation over 13 days, while June experiences a heftier 256 mm (10.1 in) spread across 20 days, making it a wetter month overall. Humidity levels are similar, with September at 85% and June slightly higher at 86%. For more detailed information, you can check La Union weather in June.
In comparing the weather between September and July, September tends to be milder with an average temperature of 8°C (47°F), peaking at 21°C (71°F), whereas July is cooler, with an average of 6°C (44°F) and a maximum of only 15°C (60°F). Additionally, September experiences less precipitation, with 118 mm (4.6 in) over 13 days, while July sees a significantly higher rainfall of 199 mm (7.8 in) over 17 days. Humidity levels are quite similar, standing at 85% for September and slightly higher at 87% for July. For more details about July weather, you can check La Union weather in July.
In comparing the weather of September and August, September emerges as the milder month, featuring a higher average temperature of 8°C (47°F), compared to August’s average of 7°C (45°F). Additionally, September enjoys warmer maximum temperatures, reaching up to 21°C (71°F) versus August’s max of 17°C (62°F). However, September is slightly wetter, with a total precipitation of 118 mm (4.6 in) over 13 days, while August experiences heavier rainfall of 226 mm (8.9 in) across 18 days. Humidity levels are comparable, with September at 85% and August slightly higher at 87%. For more detailed insights on August weather, you can visit La Union weather in August.
In September, temperatures range from a minimum of -2°C (29°F) to a maximum of 21°C (71°F), with an average of 8°C (47°F). The month sees substantial rainfall, totaling 118 mm (4.6 in) over 13 days, and an average humidity of 85%. By contrast, October experiences slightly warmer conditions, with minimum temperatures at -1°C (30°F) and maximums reaching 24°C (75°F), averaging 10°C (50°F). Precipitation remains relatively similar at 115 mm (4.5 in) but occurs over 15 days, resulting in a marginally drier feel with a humidity level of 83%. For more detailed insights on October weather in the region, check out La Union weather in October.
In comparing the weather between September and November, we see a notable shift in temperatures and precipitation. September experiences a cooler range with minimum temperatures dropping to -2°C (29°F) and an average of 8°C (47°F), while November brings a milder climate with temperatures ranging from a minimum of 1°C (35°F) to an average of 13°C (55°F). Moreover, November boasts a warmer maximum temperature of 25°C (77°F) compared to September's 21°C (71°F). Precipitation levels also decline significantly, with September receiving 118 mm (4.6 in) over 13 days, while November has just 73 mm (2.9 in) over 9 days, contributing to slightly lower humidity levels of 80% in November versus 85% in September. For more detailed information, you can visit La Union weather in November.
September and December showcase contrasting weather patterns. In September, temperatures range from a chilly minimum of -2°C (29°F) to a mild average of 8°C (47°F), peaking at a comfortable 21°C (71°F). This month experiences significant rainfall, with 118 mm (4.6 in) of precipitation over about 13 days, alongside high humidity levels at 85%. In contrast, December brings warmer conditions, with minimum temperatures rising to 3°C (38°F), an average of 15°C (59°F), and maximums reaching a balmy 30°C (86°F). Additionally, December is much drier, with only 52 mm (2.0 in) of rain across just 6 days, and slightly lower humidity at 82%. For a detailed overview of conditions, check out La Union weather in December.
As September unfolds in La Union, the weather showcases a notable transition from the chill of winter to the welcoming warmth of spring. With temperatures averaging around 8°C and peaking at 21°C, this month experiences a refreshing shift, inviting outdoor activities after the colder months. However, it also brings significant rainfall, with approximately 118 mm spread over 13 days, maintaining a high humidity level of 85% that enhances the lush landscape. Unlike the drier summer months, September's sporadic showers contribute to the region's vibrant flora and fauna. For more detailed insights into what to expect throughout the year, visit La Union Climate.