Last updated: August 21, 2025
In Buenos Aires, Argentina, January truly embodies the warmth of summer, showcasing a maximum temperature that can soar to an impressive 37°C (99°F), with an average temperature resting comfortably at around 25°C (77°F). The start of the year also brings a touch of humidity at 50%, providing a tropical feel. Despite the warmth, visitors should brace themselves for some rainfall, as the city receives an average of 59 mm (2.3 in) across about 6 days in the month. This blend of heat and precipitation creates a vibrant atmosphere, making January an exciting time to experience the life and culture of Buenos Aires.
In January, Buenos Aires basks in the height of summer, showcasing a delightful range of temperatures that entice both locals and tourists. With a minimum of 14°C (58°F) and a maximum soaring to 37°C (99°F), the average temperature of 25°C (77°F) creates the perfect backdrop for sun-soaked days. This trend of warmer weather contrasts sharply with the cooler months that follow, as February sees a slight dip, yet remains balmy with highs of 33°C (92°F). As summer gives way to autumn, temperatures gradually cool, revealing a marked decrease in the maximums through to April, where the highs hit 29°C (84°F). This gentle decline continues into the winter months, highlighting the city's vibrant seasonal shifts. The overall warmth of January sets the tone for a dynamic climate that transitions beautifully, offering a delightful experience in this enchanting city.
In January, Buenos Aires experiences a moderate amount of rainfall, with an average precipitation of 59 mm (2.3 in) spread over approximately 6 days. This sets the stage for a warm summer, as the city transitions into February with slightly higher rainfall of 72 mm (2.9 in) over 8 days. The pattern continues into March, where precipitation increases to 77 mm (3.0 in), indicating a trend of rising rainfall leading into the fall months. The autumn months of April and May see consistent precipitation averages of around 80 mm (3.2 in), albeit with more rainy days. Interestingly, the wet season peaks in October at 103 mm (4.1 in), with 10 days of rain—a stark contrast to the drier August, which only records 51 mm (2.0 in) over just 5 days. Overall, January's rainfall initiates a gradual upswing that characterizes the summer's transition into the wetter fall season.
In January, Buenos Aires experiences a relatively comfortable humidity level of 50%, making it one of the driest months of the year. However, as summer progresses into February, humidity climbs to 61%, signaling the onset of a more humid climate. This trend continues sharply through March and April, where levels surge to 66% and 80% respectively, creating a sticky atmosphere. By May, the humidity peaks at 85%, leading into the cooler winter months of June and July, where the levels slightly recede to 80% and 69%. As the seasons transition back to warmer weather in August and September, humidity remains elevated, fluctuating between 66% and 72%. Overall, the pattern demonstrates a clear increase in humidity through the summer months, followed by a gradual decline as autumn approaches, before a mild resurgence in spring. In December, the humidity moderates to 56%, wrapping up the year with a mix of refreshing and humid conditions that vary significantly throughout the seasons.
In January, Buenos Aires experiences one of its highest UV Index ratings at 14, classified as extreme, which means the potential for sunburn is realized in just 10 minutes of unprotected exposure. This intensity continues into February with a UV Index of 13, reminding residents and visitors alike to stay vigilant under the summer sun. As the season transitions into March, the UV Index slightly drops to 11, but the risk remains categorized as extreme, reinforcing the need for protective measures. Notably, the trend of high UV exposure persists well into the year, with several months exhibiting significant values. This trend highlights the importance of being sun-safe in Buenos Aires; for more detailed information, visit Buenos Aires UV Index.
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January in Buenos Aires is a sun-drenched delight, boasting 299 hours of radiant sunshine, setting the tone for a vibrant summer. As the year unfolds, February surpasses January with 321 hours, offering even more opportunities for outdoor enjoyment. The warmth continues into March, with a substantial 312 hours basking over the city, while April sees a slight dip to 259 hours as autumn begins to weave its way in. A gentle decline persists through the winter months, with June and July dipping to their lowest at 218 and 211 hours respectively. However, by August, the sun returns with 263 hours and begins to reclaim its dominance, hinting at the springtime revival ahead. Notably, November shines brightest, showcasing an impressive 341 hours before culminating in December with a spectacular 383 hours, making it the sunniest month of the year. This rhythmic ebb and flow of sunlight not only defines Buenos Aires’ climate but also enriches its vibrant culture, drawing both locals and travelers to relish every sunlit moment.
In Buenos Aires, January enjoys a 60% chance of sunshine, mirroring February’s bright outlook, making it an ideal time for outdoor activities. As the summer months progress, the likelihood of sun experiences a slight dip in March but rebounds with a notable 68% in April, suggesting a pleasantly warm transition into autumn. Interestingly, while May and June see a decrease in sunny days, the trend bounces back in July and August with 64%, offering a surprising amount of sunshine even in the heart of winter. The year concludes with October boasting the highest likelihood of sun at 69%, followed by a moderate drop in November and December, which still retain 56% and 68% chances of sunny weather, respectively. This pattern illustrates that while January is a great start to the year for sun seekers, the city's weather remains accommodating throughout the seasons.
In Buenos Aires, Argentina, January shines brightly with an impressive 14 hours of daylight, marking the height of summer. As February rolls in, the days gradually shorten to 13 hours, heralding the transition toward autumn. This decline continues through to March with 12 hours of light, as nature prepares for the cooler months ahead. April brings an additional reduction to 11 hours, followed by May's shorter 10 hours of daylight. June dips to 9 hours, the shortest of the year, as the city embraces winter. Interestingly, daylight begins to creep back in July with 10 hours, then stabilizes through August. As spring approaches, days begin to lengthen again, bouncing back to 11 hours in September, 12 hours in October, and 13 hours in November, culminating once more with 14 hours by December. This cyclical pattern reflects the rhythm of life in Buenos Aires, where each season brings a unique interplay of light and darkness.
In January, Buenos Aires feels a gentle breeze with an average wind speed of 4.7 m/s (11 mph), setting the stage for summer's warmth. As the month transitions into February, the winds calm slightly to 4.4 m/s (10 mph), while March and April see even lighter gusts, hovering around 4.2 m/s (9 mph) and 4.1 m/s (9 mph) respectively. A noticeable uptick occurs in May, bringing the speed back to 4.6 m/s (10 mph), hinting at the changing seasons. This trend continues with June and July maintaining similar speeds, but July brings a subtle increase to 4.9 m/s (11 mph), ushering in mid-year breeziness. Interestingly, September boasts the strongest winds of the year at 5.4 m/s (12 mph), before settling back to a more moderate pace in October and November. December wraps up the year with 4.9 m/s (11 mph), offering a comforting reminder of the summer wind patterns that linger throughout the seasons in this vibrant city.
Weather in Buenos Aires varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Buenos Aires, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures range from a minimum of 14°C (58°F) to a maximum of 37°C (99°F), with an average of 25°C (77°F). The month sees approximately 59 mm (2.3 in) of precipitation over six days, and humidity levels sit around 50%. In contrast, February experiences slightly cooler temperatures, with a minimum of 13°C (55°F) and a maximum of 33°C (92°F), averaging 23°C (75°F). Precipitation increases to 72 mm (2.9 in) over eight days, along with a rise in humidity to 61%. For more detailed information, you can visit Buenos Aires weather in February.
In January, the weather is characterized by warmer temperatures, with a minimum of 14°C (58°F) and a maximum reaching up to 37°C (99°F), resulting in an average of 25°C (77°F). The month experiences precipitation over six days, totaling 59 mm (2.3 in), and humidity levels are relatively moderate at 50%.
In contrast, March sees cooler conditions, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 32°C (89°F), averaging 22°C (71°F). This month experiences slightly higher precipitation at 77 mm (3.0 in) over eight days and increased humidity at 66%. For a more detailed look at the climate trends, you can view Buenos Aires weather in March.
In January, the weather in Buenos Aires is characterized by much warmer temperatures, with a minimum of 14°C (58°F) and an average of 25°C (77°F), reaching a maximum of 37°C (99°F). The humidity level is relatively low at 50%, and the city experiences about 59 mm (2.3 in) of precipitation over approximately 6 days. In contrast, April brings cooler conditions, starting with a minimum of 6°C (44°F) and an average of 19°C (66°F), peaking at 29°C (84°F). This month also sees an increase in humidity to 80% and slightly more rainfall, totaling 82 mm (3.2 in) over 8 days. For more details on April weather, visit Buenos Aires weather in April.
In January, the weather is warm, with temperatures ranging from a minimum of 14°C (58°F) to a scorching maximum of 37°C (99°F) and an average of 25°C (77°F). With relatively low precipitation of 59 mm (2.3 in) over six days and a humidity level of 50%, the month offers a dry and sunny climate ideal for outdoor activities. In contrast, May experiences a significant drop in temperatures, with a minimum of 4°C (39°F), an average of 15°C (59°F), and a maximum of 25°C (77°F). This month brings more rain, with 80 mm (3.2 in) of precipitation spread over seven days and higher humidity at 85%, creating a cooler and more humid atmosphere. For more details about May weather, visit Buenos Aires weather in May.
In January, temperatures in Buenos Aires are significantly warmer, ranging from a minimum of 14°C (58°F) to a scorching maximum of 37°C (99°F), with an average temperature of 25°C (77°F). The month experiences relatively low humidity at 50% and sees around 59 mm (2.3 in) of rainfall over six days. In contrast, June brings much cooler weather, with temperatures dipping to a minimum of 1°C (35°F) and peaking at 23°C (74°F), averaging only 12°C (54°F). This month also has higher humidity at 80%, and while it experiences slightly more precipitation at 66 mm (2.6 in) over eight days, the overall feel is much chillier. For more details, check out Buenos Aires weather in June.
The weather in January contrasts sharply with that of July. January sees much warmer temperatures, ranging from a minimum of 14°C (58°F) to a maximum of 37°C (99°F), with an average of 25°C (77°F) and relatively low humidity at 50%. In contrast, July experiences much cooler conditions, with temperatures fluctuating between 1°C (34°F) and 23°C (74°F), averaging at just 11°C (52°F), accompanied by higher humidity levels of 69%. Additionally, July tends to be a wetter month with 75 mm (3.0 in) of precipitation spread over 8 days, compared to January’s 59 mm (2.3 in) over 6 days. For more insights on July weather, you can check out Buenos Aires weather in July.
The weather in January is characterized by its warm temperatures, with a minimum of 14°C (58°F) and an average high reaching 37°C (99°F), making it one of the hottest months of the year. In contrast, August offers a much cooler climate, with temperatures ranging from a low of 2°C (36°F) to a maximum of 24°C (75°F). While January receives slightly more precipitation at 59 mm (2.3 in) over about six days, August is relatively drier with 51 mm (2.0 in) over five days, despite higher humidity at 66%. The significant difference in temperatures highlights the contrast between the two months, making January feel much more tropical compared to the chilly embrace of August. For more detailed information, you can check Buenos Aires weather in August.
January and September present contrasting weather patterns in terms of temperature and precipitation. In January, temperatures can soar with a minimum of 14°C (58°F) and a maximum reaching up to 37°C (99°F), complemented by lower humidity levels at 50%. Conversely, September experiences much cooler temperatures, where the minimum drops to 3°C (38°F) and the average is around 15°C (59°F). Additionally, September sees increased precipitation, totaling 86 mm (3.4 in) over six days, compared to January’s 59 mm (2.3 in), and higher humidity at 72%. These differences not only affect daily activities but also contribute to the distinctive atmospheres of each month. For more details on September's weather patterns, you can explore Buenos Aires weather in September.
In comparison to January, October presents a noticeable shift in weather patterns. January boasts a higher average temperature, with daytime highs reaching up to 37°C (99°F) and a minimum of 14°C (58°F), while October's temperatures are milder, ranging from a minimum of 7°C (45°F) to a maximum of 30°C (87°F). Additionally, October experiences more precipitation, with an average of 103 mm (4.1 in) over 10 days compared to January's 59 mm (2.3 in) over 6 days. The humidity also rises in October to 63%, compared to January's 50%. For a more in-depth look at the climate during this season, check out Buenos Aires weather in October.
In January, temperatures in Buenos Aires can soar, with minimums around 14°C (58°F) and maximums reaching up to 37°C (99°F), averaging 25°C (77°F). The month experiences about 59 mm (2.3 in) of precipitation over approximately 6 days, accompanied by a humidity level of 50%. In contrast, November is noticeably cooler, with minimum temperatures of 9°C (49°F), maximums of 33°C (91°F), and an average of 21°C (69°F). Precipitation increases slightly to 77 mm (3.0 in) over 8 days, and humidity is higher at 59%. For a more detailed overview, you can check Buenos Aires weather in November.
Comparing the weather in January and December reveals some notable differences. January typically experiences warmer temperatures, with minimums around 14°C (58°F), averages of 25°C (77°F), and maximums reaching up to 37°C (99°F). In contrast, December sees slightly cooler conditions, with minimum temperatures of 10°C (50°F) and maximums of 34°C (94°F). Precipitation is also somewhat similar, with January receiving 59 mm (2.3 in) over approximately 6 days, while December has slightly more rainfall at 66 mm (2.6 in) over 7 days. Moreover, humidity levels are marginally higher in December at 56%, compared to January's 50%. For more information, you can check Buenos Aires weather in December.
In January, Buenos Aires experiences a unique blend of warmth and humidity that sets it apart from other months of the year. With maximum temperatures often soaring, this month offers a vibrant summer atmosphere, inviting both locals and tourists to enjoy the city's lively outdoor culture. Unlike the cooler, more temperate months, January brings a noticeable increase in warmth and a modest amount of rainfall, typically spread across a few days, which adds freshness to the air. For those looking to explore the bustling streets and savor the lively summer scene, there’s no better time than now! To learn more about what else you can expect throughout the year, check out Buenos Aires Climate.