Last updated: August 21, 2025
In September, Arica, Chile, experiences a delightful transition into spring, with maximum temperatures reaching 22°C (72°F) and an average of 16°C (61°F). The evenings can be cool, dipping to a minimum of 11°C (52°F). This month is characterized by increased humidity at 83%, creating a refreshing atmosphere, albeit accompanied by some rainfall—31 mm (1.2 in) over about 13 days. Visitors to Arica can enjoy mild temperatures perfect for exploring the region's stunning coastal landscapes while being prepared for occasional showers that nourish the vibrant local environment.
In September, Arica, Chile, experiences a subtle transition as the cooler winter months give way to the warmer spring days. The temperatures range from a modest minimum of 11°C (52°F) to a pleasant maximum of 22°C (72°F), with an average lingering around 16°C (61°F). This marks a slight uptick from August, indicating the onset of spring's warmth, while still retaining the refreshing coolness that characterizes early spring. As the days grow longer and sunnier, the changing weather invites outdoor exploration, making September a delightful time to enjoy Arica's stunning landscapes and vibrant culture.
September marks a distinct transition in Arica, Chile, as the region experiences a notable increase in precipitation compared to the preceding months. With 31 mm (1.2 in) of rainfall over 13 days, September strikes a balance between the wetter winter months and the drier spell that follows. This uptick reflects the region's characteristic variability, where the summer months bring scant showers, exemplified by only 18 mm in January and 16 mm in February. As the seasons shift, this September precipitation not only rejuvenates the landscape but also sets the stage for a drier October ahead, hinting at the cyclical nature of Arica's climate.
In September, humidity levels in Arica, Chile, settle at a comfortable 83%, marking a slight increase from the drier months of July and August. This seasonal trend highlights a gradual return to the higher humidity levels characteristic of earlier months, with figures peaking in the summer. The months preceding September see humidity gradually decrease, reaching a low of 82% in August, but as spring approaches, it begins to rise again. Overall, the consistent humidity throughout the year, averaging around the high 80s, underlines Arica's unique climate, where moisture remains a predominant feature despite the summer's warmth.
In September, Arica, Chile continues to experience a high UV Index of 12, which falls into the extreme exposure category, necessitating a burn time of just 10 minutes. This trend mirrors the preceding months, where the UV Index remained consistently high, particularly in the summer months. As autumn approaches, while there is a slight dip from the peak 15 reached earlier in the year, sun safety remains crucial. Visitors and residents are encouraged to take precautions against UV exposure, especially as October brings the UV Index back up to 14. For more information on the UV Index levels throughout the year, visit Arica UV Index.
UV Risk Categories
September shines brightly in Arica, Chile, boasting an impressive 343 hours of sunshine. This remarkable tally keeps the momentum of the past months alive, as daylight steadily increases from the winter months. Following a warm August, which recorded 337 hours of sunshine, September continues this uplifting trend, leading seamlessly into the sun-drenched October, noted for its 367 hours of radiant light. As we transition into spring, Arica's days become not only longer but also increasingly vibrant, setting the stage for the sunniest months ahead, with December culminating in an astounding 369 hours. The progression of sunlight not only enhances the city's beauty but also uplifts spirits, making September a delightful month to bask in nature’s glow.
September in Arica, Chile, brings a moderate 21% chance of sunny weather, marking a gradual decline as the region transitions from the colder winter months. The sunniest months, January and February, boast chances of 29% and 36%, respectively, with this likelihood decreasing through the mid-year. As temperatures start to rise again in October, the chance of sunshine bounces back to 30%. This pattern illustrates a natural ebb and flow in Arica's weather, making September a transitional month where sunny days are less common, yet still possible, as the region prepares for the brighter days of spring ahead.
In September, daylight in Arica, Chile remains steady at 11 hours, continuing the pattern established in the preceding months. This consistency reveals a gradual transition from the longer days of January through August, where daylight reached up to 13 hours. As the spring months approach, Arica begins to experience longer daylight hours again, culminating in the 12-hour days of October and November. This gentle shift highlights the region's unique interplay between seasonal change and daylight availability, inviting both residents and visitors to bask in the gradual lengthening of days as summer nears.
As September arrives in Arica, Chile, a gentle shift in the breeze can be felt, marking a subtle increase in average wind speed to 2.6 m/s (6 mph). This rise follows a consistent pattern seen throughout the year, where wind speeds linger around a moderate 2.5 m/s during the winter months of June through August. The transition into September signifies a slight uptick as the region moves toward spring, maintaining an inviting atmosphere for outdoor activities. This steady wind pattern not only enhances the charm of Arica's coastal landscape but also contributes to the area's vibrant climate, making it a perfect time for locals and visitors alike to embrace the refreshing air and the beautiful surroundings.
Weather in Arica varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Arica, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present notably different weather patterns. In September, temperatures range from a cool minimum of 11°C (52°F) to a pleasant maximum of 22°C (72°F), with an average of 16°C (61°F). This month experiences 31 mm (1.2 in) of precipitation over approximately 13 days, coupled with a humidity level of 83%. In contrast, January boasts warmer temperatures, with a minimum of 17°C (63°F) and a maximum of 28°C (83°F), averaging at 22°C (72°F). The rain is less frequent in January, with only 18 mm (0.7 in) over about 5 days and a higher humidity level of 89%. Overall, while September tends to be cooler and wetter, January offers warmer temperatures and less precipitation. For more detailed information, check Arica weather in January.
In September, the weather tends to be cooler with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 22°C (72°F), while average temperatures settle around 16°C (61°F). The month experiences moderate precipitation at 31 mm (1.2 in), spread over 13 days, and maintains a humidity level of 83%. In contrast, February offers a warmer climate with minimum temperatures of 17°C (63°F) and maximum temperatures reaching 29°C (84°F). The average temperature is quite a bit higher at 23°C (73°F), and there is significantly less precipitation at just 16 mm (0.6 in) over only 3 days. Interestingly, February also has a slightly higher humidity level of 90%. For more detailed information, you can check Arica weather in February.
September and March offer distinct weather experiences. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 22°C (72°F), with an average of 16°C (61°F). The month sees a fair amount of precipitation, totaling 31 mm (1.2 in) over about 13 days, alongside high humidity levels at 83%.
In contrast, March is warmer, with temperatures starting at a minimum of 16°C (61°F) and peaking at 29°C (84°F), averaging 22°C (72°F). This month is much drier, featuring only 5 mm (0.2 in) of precipitation over just 1 day, while humidity is slightly higher at 90%.
For a detailed look at the weather in March, check out Arica weather in March.
In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 22°C (72°F), with an average of 16°C (61°F). The month experiences relatively frequent rainfall, totaling 31 mm (1.2 in) over about 13 days, coupled with a humidity level of 83%. In contrast, April sees warmer conditions with minimums of 14°C (57°F) and maximums reaching 27°C (81°F), averaging around 20°C (68°F). Precipitation drops significantly to just 12 mm (0.5 in) over only 2 days, while humidity increases slightly to 90%. For a deeper dive into April's weather specifics, you can visit Arica weather in April.
In comparing the weather of September and May, we notice a distinct contrast in temperature and precipitation patterns. September experiences milder temperatures, with a minimum of 11°C (52°F) and a maximum of 22°C (72°F), averaging around 16°C (61°F). In contrast, May is warmer overall, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 26°C (79°F), yielding an average of 18°C (65°F). Precipitation is slightly higher in May, totaling 37 mm (1.5 in) over 18 days, compared to September's 31 mm (1.2 in) spread over 13 days. Humidity levels also differ, with September at 83% and May slightly higher at 88%. For more details on May's weather patterns in Arica, check out Arica weather in May.
When comparing the weather in September and June, both months exhibit similar temperature ranges, with September showing a minimum of 11°C (52°F), an average of 16°C (61°F), and a maximum of 22°C (72°F). June, on the other hand, features slightly higher average temperatures, with a minimum of 11°C (53°F), an average of 17°C (62°F), and the same maximum of 22°C (72°F). Precipitation levels differ significantly; September sees 31 mm (1.2 in) across 13 days, while June has a higher total of 49 mm (1.9 in) spread over 24 days, resulting in increased humidity in June at 86% compared to September's 83%. For a detailed look at the weather specifics of June, you can check Arica weather in June.
In comparing the weather of September and July, both months exhibit similar minimum and average temperatures, with September experiencing a maximum of 22°C (72°F) while July peaks at a warmer 28°C (83°F). July sees more precipitation, totaling 43 mm (1.7 in) over 23 days, compared to September's 31 mm (1.2 in) over 13 days, indicating that July is wetter. Humidity remains constant at 83% in both months. For more detailed information, you can check Arica weather in July.
In comparing the weather between September and August, both months display similar temperatures, with September exhibiting slightly warmer conditions, featuring an average temperature of 16°C (61°F) and a maximum of 22°C (72°F). In contrast, August's temperatures peak at 21°C (69°F) while maintaining the same minimum temperature of 11°C (53°F). Precipitation levels are somewhat lower in September, totaling 31 mm (1.2 in) over 13 days, compared to August's 38 mm (1.5 in) across 19 days. Humidity remains high in both months, registering at 83% in September and 82% in August. For a more detailed look at the weather patterns, you can check out Arica weather in August.
September and October showcase a gradual transition in weather patterns. In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 22°C (72°F), with an average of 16°C (61°F). The month sees about 31 mm (1.2 in) of precipitation over 13 days, while humidity hovers around 83%. In contrast, October experiences slightly warmer temperatures, with a minimum of 12°C (54°F), an average of 17°C (63°F), and a maximum of 24°C (76°F). Notably, the month has less precipitation at 19 mm (0.8 in) over just 4 days, and humidity increases slightly to 87%. For more detailed information, you can check Arica weather in October.
In September, the weather is characterized by cooler temperatures, with a minimum of 11°C (52°F) and an average of 16°C (61°F), peaking at 22°C (72°F). The month also sees a fair amount of precipitation, totaling 31 mm (1.2 in) over 13 days, while humidity remains high at 83%. In contrast, November brings warmer conditions, with temperatures ranging from a minimum of 13°C (56°F) to an average of 19°C (66°F) and a maximum of 25°C (78°F). Notably, November is much drier, experiencing only 9 mm (0.4 in) of rain and no rainy days, although humidity slightly increases to 87%. For more detailed information, you can visit Arica weather in November.
In September, the weather tends to be cooler, with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 22°C (72°F) and a relatively high humidity of 83%. The month also experiences more frequent rain, with precipitation totaling 31 mm (1.2 in) over 13 days. In contrast, December offers warmer temperatures, with averages between 15°C (59°F) and 27°C (80°F). It is significantly drier, receiving just 11 mm (0.5 in) of rain over only one day, and the humidity slightly increases to 85%. For more details, check out Arica weather in December.
As autumn settles in, September in Arica offers a unique blend of mild temperatures and increased humidity, making it quite distinct from the warmer summer months. With average highs around 16°C, the weather becomes more comfortable, yet the increased precipitation of 31 mm over 13 days introduces a refreshing contrast to the arid conditions typical of other times of the year. This month often sees persistent cloud cover, and while the sun still shines, the cooler and wetter atmosphere can give a more subdued feel to the vibrant landscapes of Arica. For a deeper look into what to expect throughout the year, check out Arica Climate.