Last updated: August 21, 2025
September in Santa Rosa, Argentina showcases a captivating transition from winter to spring, with temperature highs reaching up to 36°C (96°F) and a pleasant average of 16°C (61°F). While the mercury can drop as low as -2°C (28°F) during the nights, the overall climate remains mild and inviting. Rainfall is minimal, with only 9 mm (0.4 in) recorded over just one day, allowing for plenty of sunshine and comfortable humidity levels around 51%. This month promises a delightful blend of warmth and freshness, perfect for outdoor activities and exploration.
As September unfolds in Santa Rosa, Argentina, the weather begins to shift, reflecting the transition from winter to spring. Daily temperatures start to rise, with minimums settling around -2°C (28°F) and averages climbing to a pleasant 16°C (61°F). The city experiences a welcome increase in warmth, peaking at a comfortable 36°C (96°F) on warmer days. This month marks a significant change compared to the cooler depths of July and August, where temperatures frequently dipped below freezing. The gradual warming trend signals the approach of spring, making September a delightful time to experience the region's blossoming landscapes and moderate climate.
September marks a subtle transition in Santa Rosa's climate, with precipitation amounts rising slightly to 9 mm (0.4 in), although it still ranks among the drier months. This increase can be seen as a precursor to the more humid October, which typically ushers in heavier rains. Interestingly, September contributes to the annual trend of decreasing rainfall through the middle of the year, with only one day of rain recorded. As the city moves toward the spring, this pattern hints at a gradual shift from the parched winter months, setting the stage for the re-emergence of wet days and lush landscapes in the months to come.
In September, Santa Rosa experiences a noticeable shift in humidity, with levels averaging 51%. This marks a decline from the peak of 69% in May, following a trend of decreasing humidity as the year approaches its drier months. The shift from winter to spring brings a slight relief from the heavier, more humid conditions of the previous months, particularly August’s 60%. Overall, while September’s humidity is higher than the summer months, it signals a transition toward the drier and more comfortable conditions of October and November, which typically see levels drop further to 49% and 44%, respectively.
As September rolls into Santa Rosa, Argentina, the UV Index reflects a shift towards very high levels, reaching an index of 8 with an expected burn time of just 15 minutes. This marks an increase from the more moderate conditions of the winter months. Following the gradual rise from August's index of 6, September showcases a trend that hints at the arrival of the spring season, where sun exposure becomes increasingly significant. With the UV index peaking in the upcoming months of October and November, individuals are encouraged to remain vigilant about sun safety. For more detailed insights on UV levels throughout the year, you can explore Santa Rosa UV Index.
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As September rolls in, Santa Rosa, Argentina, enjoys a delightful 319 hours of sunshine, marking a warm farewell to winter. This month continues the trend from August, which saw 313 sunshine hours, setting the stage for the vibrant spring ahead. The days are progressively getting longer, with sunshine hours steadily increasing since the coldest months of June and July, which recorded just 257 and 275 hours, respectively. This upward trajectory signals not only a turn in the seasons but also an invitation to embrace outdoor adventures as the sunshine peaks in the forthcoming months, culminating in a radiant 392 hours of sunshine in December. In this charming region, September embodies a perfect balance of warmth and light, making it an ideal time to soak in the beauty of nature.
In Santa Rosa, Argentina, the chances of enjoying sunny weather in September are notably high at 79%, making it one of the brighter months of the year. This slight dip from the preceding vibrant August, which boasts an impressive 80% chance of sunshine, suggests a gentle transition as spring progresses. Interestingly, September aligns closely with the optimistic weather patterns of both July and October, both favorable months with probabilities of sunshine hovering above 75%. This trend indicates that, as winter recedes and spring emerges, residents and visitors alike can expect a delightful dose of sun, perfect for outdoor activities and soaking in the beauty of the season.
As September unfolds in Santa Rosa, Argentina, the days begin to lengthen ever so slightly, bringing 11 hours of daylight to its residents. This month marks a subtle transition in daylight duration, reflecting the shift from the colder winter months of June and July, which offered just 9 to 10 hours. With each passing week in September, there’s a gentle promise of more sunlight as daylight hours gradually increase towards the summer peak of 14 hours in January. This shift not only heralds the arrival of spring but also sets the stage for the vibrant life and energy that the warmer months will bring, inviting both locals and visitors to enjoy the burgeoning outdoors.
As September rolls into Santa Rosa, Argentina, the winds pick up, averaging a brisk 4.0 m/s (9 mph)—the strongest gusts since the summer. This month marks a noticeable increase from the preceding winter months, which saw a dip in wind speeds between 2.7 m/s and 2.8 m/s (6 mph). After a gradual rise in August, September's winds signal the transition towards the warmer spring days, creating a refreshing and invigorating atmosphere. This uptick is mirrored in both the adjoining months of October and December, maintaining a dynamic pattern of winds that typically peak around these transitional periods. Enthusiasts and locals alike can appreciate the lively breezes, perfect for autumnal outings and outdoor activities.
Weather in Santa Rosa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in Santa Rosa range from a chilly minimum of -2°C (28°F) to a warm maximum of 36°C (96°F), with an average of 16°C (61°F). The weather is relatively dry, with only 9 mm (0.4 in) of precipitation over just 1 day and humidity levels around 51%. In contrast, January experiences much warmer conditions, with temperatures ranging from a minimum of 8°C (47°F) to a scorching maximum of 42°C (107°F) and an average of 26°C (80°F). The month is also wetter, receiving 58 mm (2.3 in) of precipitation over 9 days, but with lower humidity at 40%. For more details, you can check Santa Rosa weather in January.
When comparing the weather in September to February, notable differences emerge. September experiences a wider temperature range, with minimums dropping to -2°C (28°F) and maximums peaking at 36°C (96°F), offering a mild average temperature of 16°C (61°F). In contrast, February features consistently warmer conditions, with minimums at 10°C (50°F) and maximums reaching up to 41°C (106°F), resulting in an average temperature of 24°C (76°F). Additionally, February sees significantly increased precipitation, totaling 60 mm (2.4 in) over approximately eight days, compared to just 9 mm (0.4 in) over one day in September. Humidity levels are slightly lower in February at 46%, compared to 51% in September. For a deeper insight into February weather, visit Santa Rosa weather in February.
September and March present notably different weather patterns. In September, temperatures range from a chilly minimum of -2°C (28°F) to a warm maximum of 36°C (96°F), with an average of 16°C (61°F). The month is relatively dry, seeing only 9 mm (0.4 in) of precipitation over just one day and maintaining a humidity level of 51%. In contrast, March boasts a milder minimum temperature of 4°C (39°F) and a higher average of 22°C (71°F), reaching a maximum of 37°C (99°F). However, it experiences significantly more rainfall with 48 mm (1.9 in) over seven days and slightly higher humidity at 54%. For a more detailed look at March weather, check out Santa Rosa weather in March.
In September, temperatures can vary significantly, with a minimum of -2°C (28°F) and maximum reaching up to 36°C (96°F), averaging around 16°C (61°F). The month typically sees low precipitation of just 9 mm (0.4 in) over only 1 day, and the humidity is relatively moderate at 51%. In contrast, April offers a milder climate with minimum temperatures of 2°C (36°F) and a maximum of 32°C (90°F), averaging 18°C (64°F). This month experiences more rainfall, totaling 33 mm (1.3 in) over approximately 5 days, along with higher humidity at 65%. For more specific details about April weather, you can check Santa Rosa weather in April.
In comparing the weather between September and May, September tends to exhibit a wider temperature range, with minimum temperatures plummeting to -2°C (28°F) and highs reaching up to 36°C (96°F). This month experiences relatively low precipitation at only 9 mm (0.4 in) over 1 day, coupled with a humidity level of 51%. In contrast, May presents milder conditions, with minimum temperatures slightly above freezing at -1°C (31°F) and a maximum of 28°C (83°F). This month has a higher total precipitation of 29 mm (1.1 in) spread over 3 days, and a notably higher humidity level of 69%. For more details on May weather specifically, you can check Santa Rosa weather in May.
In comparing the weather of September and June, September experiences a broader temperature range with a minimum of -2°C (28°F) and a maximum of 36°C (96°F), along with an average temperature of 16°C (61°F). In contrast, June's temperatures are cooler, ranging from a minimum of -4°C (25°F) to a maximum of 26°C (79°F), with an average temperature of 9°C (48°F). Both months see similar levels of precipitation—September receiving 9 mm (0.4 in) over 1 day, and June a slightly lower 8 mm (0.3 in) over 2 days. Additionally, September is notably less humid at 51%, compared to June's higher humidity level of 64%. For more detailed insights, visit Santa Rosa weather in June.
September in Santa Rosa experiences a broader temperature range, with minimums of -2°C (28°F) and maximums soaring up to 36°C (96°F), leading to a comfortable average of 16°C (61°F). In contrast, July is much cooler, featuring a minimum temperature of -4°C (25°F) and a maximum of 23°C (74°F), culminating in an average of just 8°C (47°F). Both months see limited precipitation, with September receiving slightly more at 9 mm (0.4 in) compared to July's 7 mm (0.3 in) over just one day. Additionally, July tends to be more humid at 65%, while September has a lower humidity level of 51%. For more detailed insights on July weather, check Santa Rosa weather in July.
September weather shows a notable increase in temperature compared to August, with minimums of -2°C compared to -4°C, and a striking average of 16°C versus August's 11°C. Maximum temperatures also rise, reaching up to 36°C in September, while August peaks at a cooler 31°C. Precipitation remains low in both months, with September receiving 9 mm over 1 day and August only 4 mm, also over 1 day, but humidity levels are slightly lower in September at 51% compared to 60% in August. This transition marks September as a warmer and slightly drier month. For more detailed insights on August weather, check out Santa Rosa weather in August.
In comparing the weather of September and October, we observe a notable shift in temperature and precipitation. September features a broader temperature range, with a minimum of -2°C (28°F) and a maximum of 36°C (96°F), while October sees a milder minimum of 0°C (32°F) and a higher maximum of 39°C (103°F). Although September has less total precipitation at 9 mm (0.4 in) over just one day, October experiences significantly more rainfall at 25 mm (1.0 in) spread across four days. Humidity levels remain relatively stable, with September at 51% and October slightly lower at 49%. This transition in weather dynamics is highlighted further by the specifics found in Santa Rosa weather in October.
September and November showcase contrasting weather patterns. In September, temperatures range from a chilly minimum of -2°C (28°F) to a warm maximum of 36°C (96°F), with an average temperature of 16°C (61°F). The month experiences low precipitation, accumulating only 9 mm (0.4 in) over just one day, and a moderate humidity level of 51%.
In contrast, November presents a milder climate with minimum temperatures starting at 6°C (42°F) and peaking at 41°C (105°F), resulting in a higher average of 23°C (74°F). This month is considerably wetter, receiving 46 mm (1.8 in) of rainfall over eight days, while maintaining slightly lower humidity at 44%. For further details, you can check Santa Rosa weather in November.
In September, the weather features a wide temperature range, with minimums dropping to -2°C (28°F) and maximums soaring up to 36°C (96°F). The month experiences minimal precipitation, with only 9 mm (0.4 in) falling over just one day and humidity at 51%. In contrast, December brings warmer and more consistent temperatures, with a minimum of 12°C (53°F) and maximum reaching a sweltering 42°C (107°F). However, it also sees increased precipitation, totaling 40 mm (1.6 in) over approximately eight days, and lower humidity at 35%. For a more detailed look at December's climate, check out Santa Rosa weather in December.
As September graces Santa Rosa, a remarkable shift in weather unfolds, marked by warm days that can soar up to 36°C and cooler nights dipping to a refreshing 16°C. The month boasts relatively low precipitation, with only a single day of rain contributing to a total of 9 mm of moisture, leaving the landscape predominantly dry. Unlike the wetter winter months, September ushers in a delightful blend of 51% humidity, making it an ideal time for outdoor activities. This transitional phase sets the stage for the vibrant spring season ahead, offering a pleasant reprieve from the colder months. Explore more about the unique weather patterns of this region at Santa Rosa Climate.