Last updated: August 21, 2025
In January, Rosario, Argentina experiences a dynamic climate characterized by warm temperatures and occasional rainfall. With maximum highs soaring up to 41°C (105°F) and an average of 25°C (77°F), the heat is palpable, providing plenty of opportunities for outdoor activities. Nights can be refreshing, dipping to a comfortable minimum of 11°C (53°F). Despite the warmth, precipitation amounts to 105 mm (4.1 in) spread over 7 days, with humidity levels at 48%, adding a tropical flair to the summer atmosphere. Visitors can enjoy the vibrant city life while balancing sun-soaked afternoons with cooler evenings, making January a lively time to explore Rosario.
In January, Rosario, Argentina experiences a vibrant summer, with temperatures enjoying a broad spectrum from a comfortable 11°C (53°F) at night to a scorching 41°C (105°F) during the day. The average temperature settles around a pleasant 25°C (77°F), making it the ideal time for sun-seekers and outdoor enthusiasts to revel in the region's warmth. As the month progresses, a noticeable trend towards slightly cooler nights begins, hinting at the transition to February, which brings even milder specifications. The steady decline of nighttime lows to 9°C (48°F) and reduced daytime highs to 36°C (98°F) in February suggest a gradual shift into the autumn season. With this temperature fluctuation, January in Rosario not only captivates with its heat but also marks the exciting beginning of the climatic transition towards the more temperate months ahead.
In January, Rosario, Argentina experiences a notable rainfall of 105 mm (4.1 inches), contributing to its lush summer landscape. With precipitation occurring over 7 days, the weather tends to be unpredictable, bringing a mix of sun and sudden showers. Compared to the following month, February sees a sharp decline in rainfall to 63 mm (2.5 inches), continuing a trend of varying precipitation levels as the seasons shift. As the months progress, significant fluctuations in rainfall can be observed; for instance, April records the highest monthly precipitation at 131 mm (5.2 inches), while June and July witness strikingly low totals of just 29 mm (1.1 inches) and 29 mm (1.2 inches), respectively. This pattern underscores the dynamic climate of Rosario, where summer months are typically wetter, though brief dry spells punctuate the season.
In January, Rosario, Argentina, experiences a relatively mild humidity level of 48%, laying the foundation for a summer that gradually becomes more humid. As the months pass, humidity levels steadily increase, peaking at 82% in May. This trend highlights a marked shift in the climate, with April and May showcasing the highest moisture content in the air. From June onward, the humidity begins to decline, with levels dropping to 62% by July and settling around the 50-60% range for the remainder of the year. Overall, the climatic conditions of Rosario reflect a significant rise in humidity during the peak summer months, followed by a gradual decrease as the seasons transition into cooler weather.
In January, Rosario, Argentina, experiences a notably high UV Index of 14, categorized as extreme, with a burn time of just 10 minutes. This peak in sun intensity is consistent with February's UV Index of 13, emphasizing the need for protective measures during these summer months. As the season transitions into March, the UV Index slightly decreases to 11, yet still falls within the extreme exposure category. A discernible drop occurs in April with an Index of 8, transitioning to a very high category, allowing for a longer burn time of 15 minutes. Moving into the cooler months, the UV levels become more moderate, peaking at 5 in May and 4 in June and July, where longer exposure is possible. However, the UV Index climbs again in the spring months of August and September, with values of 6 and 8, respectively. The cycle continues as the year approaches its end, with October and November showing extreme levels once again, and closing out the year in December with another peak of 14. To stay informed about the UV Index trends throughout the year, visit Rosario UV Index.
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In Rosario, Argentina, January welcomes the year with a generous 294 hours of sunshine, setting a vibrant tone for the warmer months ahead. Following this sun-kissed start, February shines even brighter, boasting 324 hours as summer reaches its peak. The warmth continues into March, with 315 hours of sunshine, though a slight decline marks the onset of autumn in April, bringing it down to 260 hours. As the year progresses, the sunshine gradually diminishes, reaching its annual low in June with just 222 hours. However, the sun makes a steady return in July and August, with 227 and 281 hours, respectively, before hitting another high in November at 344 hours. This gradual climb culminates in December's dazzling 378 hours, showcasing the region's remarkable transition from summer’s embrace to autumn’s crisp charm, revealing a distinctive rhythm of sunshine that characterizes Rosario's climate throughout the year.
In January, residents of Rosario, Argentina, can expect a 60% chance of sunny weather, making it a pleasant summer month. As the season progresses into February, the likelihood of sunshine increases to 66%, setting the stage for warmer, more vibrant days. However, this trend shifts in March when the chance drops to 47%, indicating a transition to more variable weather. Interestingly, April bounces back with a 68% likelihood of sun, followed by a consistent 60% in May. As winter approaches, the sunniest days re-emerge in July and August, boasting chances as high as 74% and 78%, respectively. This seasonal cycle illustrates the dynamic weather patterns in Rosario, where summer brings abundance of sun, while early autumn and winter months may see a dip in clear skies.
In Rosario, Argentina, January shines with a generous 14 hours of daylight, inviting outdoor adventures and vibrant social gatherings. As the month transitions into February, the daylight gradually diminishes to 13 hours, signaling the onset of an approaching seasonal shift. March and April continue this trend, with daylight reducing to 12 and 11 hours, respectively, creating cozy atmospheres as summer fades. By May, the sun graces the city for just 10 hours, ushering in the winter months. However, as life stirs back in July and August, daylight stabilizes at 10 hours, with flickers of brightness beginning to return. The cycle resumes in September, with 11 hours of daylight, and gradually embraces longer days again in October at 12 hours. November sees an increase to 13 hours, culminating in December with another 14 hours, completing the annual rhythm of light and dark, as the year in Rosario dances through its distinct seasons.
In Rosario, Argentina, January ushers in a gentle breeze with an average wind speed of 3.2 m/s (7 mph), setting a comfortable tone for the summer month. As the season progresses into February and March, the winds remain consistent but slightly calmer at 2.8 m/s (6 mph). Interestingly, as autumn approaches in April, the breeze picks up again, reaching 2.9 m/s (6 mph), hinting at a subtle shift in atmospheric conditions. May and June witness a notable return to higher winds, both averaging 3.1 m/s (7 mph), reflecting a steady trend into the cooler months. July brings the strongest gusts yet at 3.3 m/s (7 mph), and despite a minor dip in August, the winds shift again in September, rising to 3.8 m/s (9 mph), the highest point of the year. As the year wraps up, November and December see the winds stabilize back to around 3.0 to 3.5 m/s (7-8 mph). Overall, the wind patterns in Rosario exhibit a dynamic ebb and flow, mirroring the changing seasons and providing a refreshing element year-round.
Weather in Rosario varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rosario, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February weather in the region exhibits some notable differences. January boasts a minimum temperature of 11°C (53°F) and an average high of 41°C (105°F), resulting in warm conditions but also significant precipitation totaling 105 mm (4.1 in) over 7 days. In contrast, February experiences slightly cooler temperatures, with a minimum of 9°C (48°F) and an average high of 36°C (98°F), while precipitation decreases to 63 mm (2.5 in) over the same number of days. Additionally, humidity rises from 48% in January to 55% in February, contributing to a more muggy atmosphere. For a more detailed look at February’s weather patterns, check out Rosario weather in February.
January in Rosario features hotter temperatures, with daily averages climbing up to 25°C (77°F) and maximums reaching a sweltering 41°C (105°F). It experiences relatively high precipitation of 105 mm (4.1 in) over 7 days, alongside a humidity level of 48%. In contrast, March brings cooler and more moderate weather, with temperatures averaging around 21°C (71°F) and highs that peak at 35°C (95°F). Precipitation is somewhat lower at 93 mm (3.6 in) across 6 days, but humidity increases to 64%. For a detailed look at the weather conditions in March, visit Rosario weather in March.
In January, the weather is significantly hotter, with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 41°C (105°F), accompanied by a relatively low humidity of 48%. In contrast, April experiences much milder temperatures, with a minimum of 3°C (37°F) and a maximum of 33°C (91°F), and higher humidity levels at 76%. Additionally, while January sees 105 mm (4.1 in) of precipitation over 7 days, April has a slight increase in rainfall, totaling 131 mm (5.2 in) across the same number of rainy days. For a more detailed look at April's conditions, visit Rosario weather in April.
In January, the weather is characterized by much warmer temperatures, with daytime highs reaching up to 41°C (105°F) and an average of 25°C (77°F), while nights are relatively mild at a minimum of 11°C (53°F). The month also experiences significant rainfall, totaling 105 mm (4.1 in) over about 7 days, and humidity levels sit at a moderate 48%.
Conversely, May brings a notable shift with cooler temperatures, where the maximum only reaches 28°C (83°F) and averages around 14°C (58°F). Nighttime lows can drop to as low as -1°C (30°F), presenting a much chillier atmosphere. Although May has less precipitation, with 71 mm (2.8 in) over 6 days, the humidity increases substantially to 82%, creating a damp feel to the air. For more detailed information about the weather during this month, you can refer to Rosario weather in May.
In January, the weather is characterized by significantly higher temperatures, with a minimum of 11°C (53°F), an average of 25°C (77°F), and a maximum reaching up to 41°C (105°F). This summer month experiences considerable rainfall, totaling 105 mm (4.1 in) over about 7 days, paired with a humidity level of 48%. In contrast, June presents much cooler conditions, with temperatures ranging from a minimum of -2°C (28°F) to a maximum of 26°C (79°F), resulting in a much lower average of 12°C (53°F). This winter month sees only 29 mm (1.1 in) of precipitation over roughly 3 days, but it is marked by higher humidity at 77%. For more details about weather conditions in June, visit Rosario weather in June.
In January, the weather in Rosario is characterized by significantly higher temperatures, with minimums around 11°C (53°F) and maximums reaching up to 41°C (105°F). This hot summer month also sees an average temperature of 25°C (77°F) and experiences substantial rainfall, with about 105 mm (4.1 in) of precipitation over 7 days and humidity levels at 48%. In contrast, July brings a much cooler climate, with temperatures ranging from a minimum of -4°C (24°F) to a maximum of 27°C (80°F), averaging 11°C (52°F). July experiences less precipitation, totaling 29 mm (1.2 in) across 6 days, and higher humidity at 62%. For more detailed insights, you can check Rosario weather in July.
In January, weather conditions in Rosario are typically hot, with temperatures ranging from a minimum of 11°C (53°F) to a blistering maximum of 41°C (105°F), accompanied by an average temperature of 25°C (77°F). The month experiences significant precipitation, with 105 mm (4.1 in) spread over about 7 days, and humidity levels sitting at 48%. In contrast, August brings a much cooler climate, with temperatures dropping to a minimum of -2°C (29°F) and averaging around 13°C (55°F), peaking at a comfortable 31°C (88°F). The precipitation in August is substantially lower at 35 mm (1.4 in) across just 4 days, while humidity rises slightly to 59%. For a more detailed look at August weather in Rosario, visit Rosario weather in August.
In January, the weather is characterized by high temperatures, with a minimum of 11°C (53°F) and an average peaking at 25°C (77°F), reaching a scorching maximum of 41°C (105°F). This month also experiences significant rainfall, with a total precipitation of 105 mm (4.1 in) over about 7 days, paired with a humidity level of 48%. In contrast, September presents much cooler conditions, featuring minimum temperatures dropping to -1°C (31°F) and an average of 16°C (60°F), with a maximum of 33°C (92°F). The precipitation is lower at 58 mm (2.3 in) across roughly 6 days, but the humidity rises to 62%. For a closer look at the weather specifics in September, you can visit Rosario weather in September.
January and October in Rosario present contrasting weather patterns. January boasts significantly warmer temperatures, with an average high of 41°C (105°F) and a minimum of 11°C (53°F), while October sees much cooler averages, ranging from a minimum of 4°C (40°F) to a maximum of 37°C (100°F). In terms of precipitation, January is wetter, with 105 mm (4.1 in) spread over 7 days, compared to October's 63 mm (2.5 in) over 8 days. Humidity also varies slightly, with January at 48% and October at 52%. For more details on October weather, you can check out Rosario weather in October.
January and November weather exhibit notable differences in temperature and humidity. In January, temperatures hover between a minimum of 11°C (53°F) and a scorching maximum of 41°C (105°F), with an average of 25°C (77°F). The month sees rainfall reaching 105 mm (4.1 in) over about 7 days, accompanied by a humidity level of 48%. In contrast, November features milder temperatures, ranging from a minimum of 7°C (45°F) to a maximum of 37°C (98°F), with an average temperature of 22°C (71°F). Precipitation in November totals 81 mm (3.2 in) over approximately 6 days, with humidity slightly higher at 56%. For more details, check out Rosario weather in November.
In January, the weather tends to be slightly warmer compared to December, with average temperatures reaching 25°C (77°F) and maximums hitting as high as 41°C (105°F). In contrast, December sees an average temperature of 24°C (75°F) and a maximum of 38°C (100°F). Additionally, January experiences more precipitation, totaling 105 mm (4.1 in) over 7 days, while December receives 69 mm (2.7 in) over 8 days. Humidity levels are also marginally lower in January at 48%, compared to December's 51%. For a detailed look at December weather in the region, you can refer to this link: Rosario weather in December.
January in Rosario presents a striking contrast to other months, with scorching maximum temperatures reaching up to 41°C (105°F) and a warm average of 25°C (77°F). The summer sun bathes the city, but the refreshing breezes and moderate humidity at 48% offer some relief. While the month sees occasional rainfall, with 105 mm (4.1 in) spread over just 7 days, it significantly contributes to the lush landscapes that define this time of year. For a more detailed look at the year-round climate, check out Rosario Climate.