Last updated: August 21, 2025
In September, Rosario, Argentina experiences a transition from winter to spring, characterized by a striking variation in temperatures. Daytime highs can reach up to 33°C (92°F), while the average temperature settles around 16°C (60°F), offering warm afternoons and cooler nights that can dip to a chilly -1°C (31°F). This month sees 58 mm (2.3 in) of precipitation spread over approximately 6 days, contributing to an overall humidity level of 62%. As spring blossoms, the city transforms into a vibrant hub of activity, inviting both locals and visitors to enjoy its moderate climate and lush landscapes.
As September rolls in, Rosario, Argentina experiences a gradual transition from the cool grip of winter to the warmth of spring. With temperatures ranging from a minimum of -1°C (31°F) to a maximum of 33°C (92°F), the city showcases a pleasant average of 16°C (60°F). This month marks a notable uptick in warmth compared to the preceding winter months, as daylight hours lengthen and the landscape begins to bloom. As the weather shifts, residents and visitors alike can enjoy a mix of sunny days and cooler evenings, perfect for outdoor activities and exploring the vibrant culture of this lively city.
In September, Rosario, Argentina experiences a moderate dip in precipitation, recording 58 mm (2.3 in) over 6 days. This marks a slight decrease compared to the wetter months of April and March, which showcase significantly higher rainfall levels. However, September still holds its own as part of the transition into spring, balancing light rains that support the burgeoning greenery. Following the relatively dry winter months of June and July, this uptick in precipitation reflects the gradual shift towards the more humid conditions expected in the months ahead, setting the stage for an increasingly vibrant landscape as the city moves into October.
As the seasons shift in Rosario, Argentina, September marks a transitional period with humidity levels hovering around 62%. This represents a slight rebound from the drier months of winter, with July and August experiencing lower humidity at 62% and 59%, respectively. As spring approaches, humidity begins to rise, reflecting a progressive trend from the drier colder months toward the more humid conditions typical of early spring. The city's climate illustrates a rhythmic ebb and flow, with humidity consistently increasing through the autumn months, culminating in the higher readings seen in May and April. Observing these shifts not only highlights the charm of Rosario's weather patterns but also sets the stage for the flourishing vibrancy of the region as it moves toward the warmer months ahead.
In September, Rosario, Argentina, experiences a UV Index of 8, categorized as very high, with a burn time of just 15 minutes. This marks a notable transition as the city shifts from the extreme UV levels of the summer months, particularly January through March, where indices peaked at 14. Following the lower exposures in the winter months of May through July, September’s UV levels signify a resurgence of intensity, nudging residents to remain vigilant with sun protection. As warmer days approach, it’s essential to stay informed and protect your skin during these sunny spells. For an in-depth look at UV levels throughout the year, visit Rosario UV Index.
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In September, Rosario, Argentina, basks in the glow of 273 hours of sunshine, marking a gentle transition from the colder months into the vibrant warmth of spring. This delightful month witnesses more sun than the winter months of June and July, and it sets the stage for October’s impressive 310 hours. The trend of increasing sunshine hours is evident, as the city moves from the chilly grip of winter towards the sunnier days of summer, promising an inviting atmosphere for outdoor activities and leisurely pursuits. As the days grow longer, Rosario's september sun heralds a season brimming with blossoming flowers and bright horizons.
In September, the chance of sunny weather in Rosario, Argentina hovers around 50%, marking a notable shift as winter wanes and spring approaches. This transitional month often sees fluctuating weather patterns, contrasting sharply with the reliability of sunshine observed in the preceding months of July and August, which benefit from significantly higher probabilities of clear skies at 74% and 78%, respectively. As the seasons change, September may offer a delightful mix of sunny days peppered with the remnants of winter, creating an invigorating atmosphere as the city emerges into the warmth of spring. The sun's presence is crucial for those seeking outdoor activities, proving that while there are promising sunny days ahead, visitors should still prepare for occasional clouds.
As September settles in Rosario, Argentina, daylight begins to slowly extend its reach, offering approximately 11 hours of sunlight each day. This marks a subtle shift from the shorter days of winter, as the city's residents savor the gradual transition from the darker months of June and July. Following a peak of 14 hours in January and February, the daylight duration during September hints at a resurgence towards those longer summer days ahead. The rhythm of the seasons is palpable, with each month weaving its own narrative of light and shade, leading from the crispness of winter to the vibrant warmth of spring.
As September rolls into Rosario, Argentina, the winds begin to pick up, bringing a refreshing change to the late-winter atmosphere. With an average wind speed of 3.8 m/s (9 mph), September marks a noticeable increase compared to the calmer months of winter, providing a gentle reminder that spring is on the horizon. This trend of rising wind speeds continues the gradual uptick observed from July through September, highlighting a shift from the more stable conditions of the earlier months. As the breeze dances through the city, it invigorates the landscape and signals the vibrant transformations that accompany the arrival of warmer days.
Weather in Rosario varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rosario, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit strikingly different weather patterns. September experiences milder temperatures with a minimum of -1°C (31°F) and a maximum of 33°C (92°F), averaging around 16°C (60°F). This month sees about 58 mm (2.3 in) of precipitation over 6 days, with a humidity level of 62%. In contrast, January brings much warmer conditions, featuring a minimum of 11°C (53°F) and soaring to a maximum of 41°C (105°F), with an average temperature of 25°C (77°F). Precipitation increases to 105 mm (4.1 in) over 7 days, but humidity drops to 48%. For more details on January weather patterns, check out Rosario weather in January.
In September, the weather in Rosario displays a considerable range in temperatures, with minimums dropping to -1°C (31°F) and maximums reaching up to 33°C (92°F). The average temperature is around 16°C (60°F), and the month experiences about 58 mm (2.3 in) of precipitation over approximately 6 days, coupled with a humidity level of 62%.
In contrast, February is significantly warmer, with minimum temperatures starting at 9°C (48°F) and peaking at a high of 36°C (98°F). The average temperature during this month is a comfortable 24°C (75°F). Precipitation increases slightly to 63 mm (2.5 in) over about 7 days, but the humidity is lower at 55%. For a detailed overview of February weather, visit Rosario weather in February.
In comparing the weather patterns of September and March, we observe notable differences in temperature and precipitation. September presents a broader temperature range, with a minimum of -1°C (31°F), an average of 16°C (60°F), and a maximum of 33°C (92°F). The month experiences around 58 mm (2.3 in) of precipitation over 6 days, accompanied by a humidity level of 62%. In contrast, March features milder conditions with temperatures starting at a minimum of 7°C (44°F), an average of 21°C (71°F), and peaking at 35°C (95°F). It also experiences higher total precipitation at 93 mm (3.6 in) across the same number of rainy days, resulting in slightly elevated humidity at 64%. For more detailed information, check out Rosario weather in March.
September and April exhibit notable differences in weather patterns. In September, temperatures range from a chilly minimum of -1°C (31°F) to a warm maximum of 33°C (92°F), with an average of 16°C (60°F). This month typically experiences moderate precipitation, totaling 58 mm (2.3 in) over about 6 days, coupled with a humidity level of 62%. Conversely, April presents a milder climate with temperatures starting at a minimum of 3°C (37°F) and peaking at 33°C (91°F), averaging around 19°C (66°F). Precipitation is significantly higher in April, accumulating to 131 mm (5.2 in) across 7 days, and humidity also increases to 76%. For more detailed information, you can refer to Rosario weather in April.
September and May show notable differences in weather patterns. In September, temperatures range from a minimum of -1°C (31°F) to a pleasant average of 16°C (60°F), with a maximum reaching 33°C (92°F). The month experiences about 58 mm (2.3 in) of precipitation over 6 days, and the humidity sits at a moderate 62%. In contrast, May features a similar minimum temperature of -1°C (30°F) but has a cooler average of 14°C (58°F) and a slightly lower maximum of 28°C (83°F). Precipitation increases to 71 mm (2.8 in), also spread over 6 days, with higher humidity at 82%. For more details on May’s weather, visit Rosario weather in May.
In comparing the weather between September and June, one can notice a notable contrast in temperature and humidity. September experiences a wider temperature range, with minimums of -1°C (31°F) and maximums reaching up to 33°C (92°F), while June sees lower temperatures, with minimums at -2°C (28°F) and a maximum of 26°C (79°F). Additionally, September's average temperature is significantly higher at 16°C (60°F) compared to June's average of 12°C (53°F). Precipitation is also more frequent in September, with 58 mm (2.3 in) over 6 days, contrasted with June's 29 mm (1.1 in) over just 3 days. Furthermore, September has a humidity level of 62%, making it less humid than June, which sits at 77%. For more details on June weather, visit Rosario weather in June.
When comparing the weather in September to that of July, notable differences emerge in both temperature and precipitation patterns. September sees a warmer average temperature of 16°C (60°F), significantly higher than July's average of 11°C (52°F). Additionally, September experiences a higher maximum temperature of 33°C (92°F), compared to July's peak of 27°C (80°F). Precipitation levels are also higher in September, with 58 mm (2.3 in) of rain over six days, compared to July's 29 mm (1.2 in) over the same number of days. Despite these differences, both months share a consistent humidity level of 62%. For more specific insights, you can check out Rosario weather in July.
In comparing the weather of September and August, September exhibits a slightly broader temperature range with minimums reaching -1°C (31°F), an average of 16°C (60°F), and maximums peaking at 33°C (92°F). In contrast, August’s temperatures range from a minimum of -2°C (29°F), an average of 13°C (55°F), to a maximum of 31°C (88°F). Additionally, September sees increased precipitation with 58 mm (2.3 inches) over 6 days, compared to August’s 35 mm (1.4 inches) over 4 days. Humidity levels are fairly comparable, with September at 62% and August at 59%. For further insights into August weather specifics, you can refer to Rosario weather in August.
In September, the weather experiences a wide temperature range with minimums dropping to -1°C (31°F) and maximums reaching 33°C (92°F), leading to an average temperature of 16°C (60°F). The month also sees around 58 mm (2.3 in) of precipitation over approximately 6 days, accompanied by a humidity level of 62%, creating a mix of chilly and warm days.
In contrast, October brings slightly milder conditions with minimum temperatures rising to 4°C (40°F) and maximums soaring to 37°C (100°F), resulting in an average temperature of 18°C (65°F). Precipitation increases marginally to 63 mm (2.5 in) spread over 8 days, while the humidity decreases to 52%, suggesting a drier feel. For more detailed insights on October weather, you can check Rosario weather in October.
September and November weather show notable differences in temperature and precipitation patterns. In September, temperatures range from a chilly -1°C (31°F) at night to a daytime average of 16°C (60°F), peaking at a warm 33°C (92°F). The month experiences around 58 mm (2.3 in) of precipitation over six days and has a humidity level of 62%. In contrast, November offers a milder climate with minimum temperatures around 7°C (45°F) and an average of 22°C (71°F), reaching highs of 37°C (98°F). It sees a slightly higher precipitation of 81 mm (3.2 in) over the same number of days but with lower humidity at 56%. For more details, you can visit Rosario weather in November.
In September, the weather typically exhibits a wider temperature range with minimums dipping to 1°C (31°F) and maximums reaching up to 33°C (92°F), averaging around 16°C (60°F). The month experiences about 58 mm (2.3 in) of precipitation over approximately 6 days, with a higher humidity level of 62%. In contrast, December brings warmer temperatures with minimums of 10°C (50°F) and maximums soaring to 38°C (100°F), averaging a comfortable 24°C (75°F). Precipitation increases slightly to 69 mm (2.7 in) across 8 days, but humidity drops to 51%. This significant difference highlights the transition from early spring to the peak of summer in this region. For more details, you can check Rosario weather in December.
As September rolls in, Rosario experiences a refreshing transition from the cooler winter months to a more temperate climate. With average temperatures averaging around 16°C and maximums reaching up to 33°C, the days become significantly warmer, presenting a delightful shift for residents and visitors alike. While the humidity hovers at a comfortable 62%, the month does see a moderate 58 mm of rainfall over six days, providing much-needed moisture to support the budding spring. This combination of warmth and occasional rain sets September apart from the more extreme highs and lows experienced in both summer and winter. For a deeper dive into the climate of this vibrant city, check out Rosario Climate.