Last updated: August 21, 2025
In September, Bahia Blanca, Argentina, experiences a refreshing transition into spring, with maximum temperatures reaching a pleasant 26°C (79°F) and an average of 12°C (55°F). As the weather warms, night temperatures can dip to a brisk 1°C (34°F), showcasing the area's diverse climate. This month sees approximately 42 mm (1.6 in) of rainfall distributed over five rainy days, contributing to an average humidity level of 71%. Overall, September offers a delightful blend of warm days and crisp evenings, making it an ideal time to enjoy the region’s beautiful landscapes.
In September, Bahia Blanca begins to shake off the chill of winter, with temperatures gradually rising as spring approaches. The month sees a minimum of 1°C (34°F), making it relatively cool, but the average temperature climbs to a comfortable 12°C (55°F), while daily highs can reach up to 26°C (79°F). This shift marks a notable transition from the preceding months of colder temperatures, heralding a period of milder days and refreshing breezes. Overall, September sets the stage for the warmth of the coming months, as the city embraces the pleasantness of early spring.
In September, Bahia Blanca experiences a notable transition in its weather patterns, with precipitation totaling 42 mm (1.6 in) spread over five days. This marks a slight increase from the preceding months, particularly August, which saw only 22 mm (0.9 in) of rain across three days. As the spring season approaches in the Southern Hemisphere, this uptick in rainfall signals a shift towards more humid conditions, preparing the landscape for the wetter months ahead. Typically, October follows with an even more significant increase, hinting at a trend where September acts as a precursor to the lush, rainier late spring and early summer in Bahia Blanca.
In Bahia Blanca, Argentina, September marks a transitional moment in the annual humidity cycle. With humidity levels at 71%, the month reflects a slight decline from the peak of 77% observed in May, heralding the slow descent towards the drier months ahead. Following the upward trend from January’s 61% through to April’s 75%, September's figures suggest a stabilization that carries into October, where humidity dips to 68%. This return towards lower humidity indicates the onset of spring and a gradual shift away from the dampness characteristic of the winter months. Overall, September’s moderate humidity offers a refreshing balance before the drier climate fully resumes.
In September, Bahia Blanca experiences a UV Index of 7, placing it in the high exposure category with a burn time of 25 minutes. This marks a transition from the lower indices of winter, reflecting the gradual increase in sunlight as spring approaches. While the UV Index is notably lower than the extreme levels seen in the peak of summer, such as 14 in January and 12 in February, September still warrants caution for outdoor activities. The upward trend in UV levels from the end of winter indicates that residents and visitors should remain vigilant about sun protection. For more detailed information on regional UV levels throughout the year, check out the Bahia Blanca UV Index.
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As the brisk winds of winter give way to the warmth of spring, September in Bahia Blanca shines with an impressive 278 hours of sunshine. This increase from the previous months signals a delightful transition, as daylight gradually returns after the quieter winter months. Following the cooler August, which recorded 265 hours, the lengthening days create a vibrant atmosphere ripe for outdoor activities and exploration. The upward trend continues as the region moves into October and November, where sun-soaked days become even more abundant, offering a preview of the sun-drenched summer to come. September’s sunshine sets the stage for a captivating season ahead, inviting residents and visitors alike to bask in the rejuvenating glow of Argentine spring.
In Bahia Blanca, Argentina, the likelihood of sunny weather sees a gradual transition as the year progresses. September boasts a 54% chance of sun, placing it in the middle range compared to other months. This marks a slight dip from the sunny spells of winter, yet it showcases an improvement when compared to the dreariness of late autumn and early winter, where chances fall to as low as 42% in June. As the year progresses towards summer, the sunniest months approach, with October promising a rebound to a 68% chance. Overall, while September may not be the brightest month, it hints at the sunny days to come, providing a pleasant interlude between the cooler seasons.
As September unfolds in Bahia Blanca, Argentina, the daylight duration begins to shift back to longer days, offering a refreshing change after the long winter months. With 11 hours of daylight, September marks a distinct transition, reminiscent of the gradual increase in sunlight that characterizes the start of spring. This emerging brightness follows the shortest days of winter in June and July, which hold steady at 9 hours, before gradually increasing through August and reaching 13 hours by October. As the year progresses, the rhythm of daylight continues to rise, peaking at 14 hours in November and December, inviting longer evenings and vibrant outdoor activities. This cycle of light not only highlights seasonal transformations but also enhances the experience of life in Bahia Blanca, where each month unfolds a unique relationship with the sun.
As September arrives in Bahia Blanca, the winds dance in a delicate balance, with an average speed of 5.1 m/s (11 mph). This slight dip from the summer breezes indicates a natural transition as the region prepares for the coming autumn. Interestingly, the wind speeds in September are consistent with the patterns seen in the preceding spring months, where averages hover around similar figures. As the year progresses, the winds in Bahia Blanca generally exhibit a gentle rhythm, with occasional peaks in July and August reaching 5.5 m/s (12 mph). This harmonious fluctuation in wind speeds encapsulates the essence of the changing seasons, providing a refreshing, breezy backdrop for the vibrant life of the city.
Weather in Bahia Blanca varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bahia Blanca, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present striking contrasts in weather patterns. In September, temperatures range from a chilly minimum of 1°C (34°F) to a comfortable average of 12°C (55°F), peaking at a warm 26°C (79°F). The month sees about 42 mm (1.6 in) of precipitation over 5 days, with humidity levels at 71%. In contrast, January features much warmer conditions, with a minimum of 11°C (52°F) and average highs reaching 24°C (75°F) and soaring up to 39°C (103°F). Rainfall is lighter, totaling 31 mm (1.2 in) over just 4 days, and humidity falls to 61%. For a detailed look at January weather patterns, check out Bahia Blanca weather in January.
September weather in Bahia Blanca features a mild range of temperatures, with minimums dipping to 1°C (34°F) and maximums reaching up to 26°C (79°F). The month sees an average temperature of 12°C (55°F) and experiences some rainfall, totaling 42 mm (1.6 in) over about five days, accompanied by a humidity level of 71%. In contrast, February brings noticeably warmer conditions, with temperatures ranging from a minimum of 10°C (49°F) to a maximum of 35°C (95°F), and an average of 22°C (72°F). Though February has slightly higher precipitation at 55 mm (2.2 in) over the same five days, its humidity is marginally lower at 67%. For more detailed insights on February's weather specifics, you can check Bahia Blanca weather in February.
September and March present quite distinct weather patterns. September begins with cooler temperatures, averaging 12°C (55°F) and ranging from a chilly 1°C (34°F) to a warm 26°C (79°F). With 42 mm (1.6 in) of precipitation over about 5 days, the humidity hovers around 71%. In contrast, March is noticeably warmer, featuring an average temperature of 20°C (68°F) and peaks reaching up to 34°C (93°F). It also sees a similar amount of rainfall at 44 mm (1.7 in) across approximately 6 days, with slightly lower humidity at 70%. For further details, check out Bahia Blanca weather in March.
When comparing the weather in September and April, we see notable differences. September typically experiences cooler temperatures with a minimum of 1°C (34°F) and an average of 12°C (55°F), while April warms up considerably, with a minimum of 3°C (38°F) and an average of 17°C (63°F). The maximum temperatures also rise in April, reaching up to 30°C (87°F) compared to September's peak of 26°C (79°F). Additionally, April sees more precipitation, averaging 61 mm (2.4 in) over 6 days, slightly higher than September's 42 mm (1.6 in) over 5 days. Despite a marginally lower humidity level in September at 71%, the humidity rises to 75% in April, contributing to a more humid feel. For more detailed insights, visit Bahia Blanca weather in April.
When comparing the weather in September and May, both months exhibit similar temperature ranges, with September having a slightly higher maximum temperature of 26°C (79°F) compared to May's 24°C (76°F). The minimum temperatures remain identical at 1°C (34°F), and the average temperatures are closely matched at 12°C (55°F) for September and 12°C (54°F) for May. Precipitation levels are also comparable, with September receiving 42 mm (1.6 in) and May totaling 44 mm (1.7 in), both occurring over five days. However, May is characterized by slightly higher humidity at 77% compared to September's 71%. For a more detailed look at May's weather, you can refer to Bahia Blanca weather in May.
In comparing the weather of September and June, September tends to be warmer overall, with average temperatures reaching up to 12°C (55°F) and a maximum of 26°C (79°F), while June's temperatures are more moderate, with an average of 9°C (49°F) and a maximum of only 19°C (67°F). Both months experience similar levels of precipitation, with September receiving 42 mm (1.6 in) and June slightly higher at 43 mm (1.7 in), occurring over five days in each month. Humidity is relatively consistent, slightly lower in September at 71% compared to June's 74%. For a detailed look at the weather trends specific to June, you can visit Bahia Blanca weather in June.
When comparing the weather of September and July, September tends to be significantly warmer. The minimum temperature in September is 1°C (34°F), with an average of 12°C (55°F) and a maximum of 26°C (79°F). In contrast, July sees cooler temperatures, ranging from a minimum of -1°C (30°F) to an average of 8°C (47°F) and a maximum of 19°C (66°F). Precipitation remains relatively consistent, with September receiving 42 mm (1.6 in) over 5 days and July slightly higher at 43 mm (1.7 in) over 4 days. Interestingly, both months maintain similar humidity levels at 71%. For more details on July weather specifically, visit Bahia Blanca weather in July.
In comparing the weather of September and August, September generally features milder temperatures and increased warmth, with a range of 1°C (34°F) to 26°C (79°F), while August has a slightly cooler range of -1°C (31°F) to 23°C (74°F). September also experiences more precipitation, totaling 42 mm (1.6 in) over 5 days, compared to only 22 mm (0.9 in) over 3 days in August. Additionally, the humidity is a bit higher in September at 71%, compared to August's 68%. For a closer look at the weather specifics during August, you can check this link: Bahia Blanca weather in August.
September and October exhibit noticeable differences in weather patterns. In September, temperatures range from a cool minimum of 1°C (34°F) to a pleasant maximum of 26°C (79°F), averaging around 12°C (55°F). The month experiences about 42 mm (1.6 in) of precipitation over 5 days, with humidity levels at 71%. In contrast, October sees a rise in temperatures, with minimums of 4°C (39°F) and maximums reaching a warm 32°C (91°F). The average temperature increases to 15°C (60°F), and precipitation slightly rises to 49 mm (1.9 in) over 6 days, while humidity drops to 68%. For more details, visit Bahia Blanca weather in October.
In September, temperatures range from a cool minimum of 1°C (34°F) to a comfortable maximum of 26°C (79°F), with an average of 12°C (55°F). The month sees about 42 mm (1.6 in) of precipitation over approximately 5 days, with humidity averaging 71%. In contrast, November experiences milder conditions, with minimum temperatures at 6°C (43°F) and maximums reaching up to 31°C (89°F), while the average temperature climbs to a warm 19°C (66°F). However, November also brings more rainfall, totaling 76 mm (3.0 in) over 7 days, though with slightly lower humidity at 65%. For more details on November's climate, you can check Bahia Blanca weather in November.
In comparing the weather between September and December, we see a significant increase in temperatures. September has a minimum of 1°C (34°F) and an average of 12°C (55°F), reaching a maximum of 26°C (79°F). In contrast, December features a much warmer range, with a minimum of 8°C (47°F), an average of 22°C (71°F), and a maximum soaring to 36°C (97°F). Additionally, the overall precipitation slightly increases in December to 54 mm (2.1 in) over six days, compared to September's 42 mm (1.6 in) over five days. Interestingly, December also experiences lower humidity levels at 58% compared to September's 71%. For a more detailed look at December's weather in Bahia Blanca, visit Bahia Blanca weather in December.
As September unfolds in Bahia Blanca, the transition from winter to spring brings a refreshing change in the weather. Daytime temperatures are noticeably warmer, often reaching delightful highs, while nighttime can still surprise with a chill. Unlike the preceding months characterized by colder conditions, September enjoys an average temperature that offers a more comfortable climate, although occasional rainfall—albeit modest—adds a hint of variability. With humidity levels at 71%, the air carries a pleasant freshness, marking a welcoming shift for locals and visitors alike. For a deeper understanding of the region's weather patterns, explore the details on Bahia Blanca Climate.