Last updated: August 21, 2025
January in Puerto Iguazu, Argentina is characterized by warm to hot temperatures, with maximum highs soaring to 39°C (102°F) and an average of 27°C (80°F). The nights can be cooler, dipping to a minimum of 16°C (62°F). This month experiences considerable humidity at 82%, contributing to a tropical feel. Rainfall is also notable, with a total precipitation of 154 mm (6.1 in) spread over 16 days, making it essential for visitors to be prepared for occasional showers amidst the lush surroundings and stunning natural beauty the region offers.
In January, Puerto Iguazu experiences warm and inviting temperatures, making it a prime time for explorers. With a minimum of 16°C (62°F) and an average of 27°C (80°F), the days can soar to a sizzling 39°C (102°F). This month marks the peak of summer, as tropical heat prevails before slightly cooling in February. Temperatures in February hover closely behind, with a minimum of 15°C (59°F) and a maximum of 37°C (98°F), introducing a touch of relief. However, as the year progresses into March, a gradual decline begins, ushering in milder conditions characterized by temperatures ranging from 13°C (55°F) to 36°C (97°F). This trend of decreasing warmth continues until April, where a noticeable transition towards cooler autumn evenings is evident, dropping to 8°C (47°F) at night. Overall, January showcases the peak of heat in Puerto Iguazu, perfect for enjoying its lush natural surroundings before autumn takes hold.
In January, Puerto Iguazu experiences its peak rainfall of the year, with an impressive 154 mm (6.1 in) of precipitation spread over approximately 16 days. This sets the tone for a lush summer, as the rain supports the vibrant foliage surrounding the iconic waterfalls. Following January, February sees a significant drop, with rainfall decreasing to 111 mm (4.4 in) over just 11 days, indicating a slight easing of the wet weather. As the months progress into autumn, precipitation continues to stabilize, averaging around 105 to 149 mm in the following months, while the number of rainy days also lessens. By July, the landscape shifts dramatically with only 43 mm (1.7 in) of rain over 6 days, marking a drier phase. Notably, rainfall begins to surge again in October, likely revitalizing the local environment just as the year starts winding down towards another peak in December. This cyclical pattern highlights the distinct wet and dry seasons of this enchanting region, making it a fascinating area for climate observation.
In January, Puerto Iguazu experiences a notably high humidity level of 82%, setting the tone for a sweltering summer. This humidity peaks in December at 85%, hinting at the region's tropical climate, while it begins a steady decline through the early months of the year. As February transitions to 79% humidity, a subtle decrease continues into March with 75% and April at 74%. By mid-year, humidity drops significantly, reaching a refreshing 61% in July. The trend suggests a shift from the sultry summer months towards a more comfortable atmosphere, hitting its lowest point in August with 49%. As the year progresses, humidity begins to creep back up, culminating in November’s 73% before the cycle resets with December’s steamy 85%. This fluctuation illustrates Puerto Iguazu's dynamic weather patterns, perfect for those who appreciate the contrasts of nature.
In January, Puerto Iguazu experiences an extreme UV Index of 15, indicating that sun exposure poses a significant risk, with a burn time of just 10 minutes. This high level of UV radiation persists through February and into March, where the index slightly dips to 13, but remains in the extreme category. As the year progresses, the UV Index gradually decreases, reaching a more manageable 10 in April before settling at 7 in May, reflecting a transition to high exposure levels. The summer sun reasserts itself from August to October with renewed intensity, where the index once again climbs to 13 and 15, underscoring the importance of sun protection during these months. Despite some fluctuations, the overall trend illustrates that visitors should remain vigilant against UV exposure, especially in the height of summer. For more detailed information, explore the complete Puerto Iguazu UV Index.
UV Risk Categories
In Puerto Iguazu, January unveils 252 hours of sunshine, setting the stage for a vibrant summer that draws tourists to its breathtaking waterfalls. As the year progresses, the sun graces the region more generously, with November reaching a striking 319 hours of bright days, perfect for outdoor explorations. Interestingly, February and March mirror each other at 310 hours, offering a warm, inviting atmosphere for visitors to revel in. However, the days gradually shorten as winter approaches, yet even the lowest sunny month, June, still boasts a respectable 233 hours. Overall, this captivating trend of increasing sunlight throughout the warmer months highlights the allure of Puerto Iguazu as a sun-soaked paradise, inviting travelers to bask in its natural beauty year-round.
In Puerto Iguazu, January brings a modest 28% chance of sunny weather, setting the stage for a summer start that feels quite uncertain. This figure starkly contrasts with the following months, where the likelihood of sunshine rises significantly. By February, the probability leaps to a promising 67%, suggesting a trend toward brighter days as summer intensifies. This upward shift continues into March and April, where the chances remain robust at 54% and 62%, respectively. Following this sunny surge, the likelihood fluctuates but stays relatively strong through the mid-year months, with 67% in July and 62% in August. With a gradual decline in sunlit days as the year wanes, visitors in January might find themselves braving a mix of cloud cover, but the subsequent months offer ample opportunity for sunshine and outdoor adventure.
In Puerto Iguazu, Argentina, January kicks off the year with an enticing 13 hours of daylight, providing ample opportunity to explore its stunning natural wonders. This extended daylight begins a gradual tapering off in February and March, where it settles at 12 hours, before dipping to 11 hours in the cooler months of April and May. Notably, June to July, the shortest days, maintain a steady 10-hour duration, creating a tranquil atmosphere perfect for cozying up in the lush surroundings. As the seasons shift, daylight begins to extend again, with August and September returning to 11 hours, followed by a resurgence to 12 hours in October. The year concludes on a high note, as November and December mirror January's bright start with another 13 hours, culminating in an inviting ambiance that beckons visitors to bask in the beauty of the region.
In January, Puerto Iguazu experiences a gentle breeze with an average wind speed of 2.6 m/s (6 mph), setting a calming tone for this vibrant region. This mild wind continues into February and March, where speeds slightly decrease to 2.2 m/s and 2.3 m/s, respectively, creating a tranquil atmosphere conducive to enjoying the breathtaking waterfalls and lush landscapes. As the year progresses, wind speeds gradually pick up, peaking in September at 2.9 m/s (6 mph), bringing a refreshing change to the warmer days. From April through October, the winds stabilize around 2.5 to 2.8 m/s, ensuring a consistent, pleasant breeze that complements the tropical climate. This steady wind pattern not only enhances the natural beauty but also makes Puerto Iguazu an inviting destination throughout the year.
Weather in Puerto Iguazu varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Puerto Iguazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
January typically experiences slightly warmer temperatures compared to February, with average highs reaching 39°C (102°F) and lows around 16°C (62°F). In contrast, February has a modestly cooler average high of 37°C (98°F) and a low of 15°C (59°F). Additionally, January is characterized by higher precipitation, recording 154 mm (6.1 in) over 16 days, compared to February's 111 mm (4.4 in) over 11 days. Humidity levels also decrease slightly from January's 82% to February's 79%. For more detailed information, you can check out Puerto Iguazu weather in February.
In comparing the weather between January and March, we see a noticeable shift in temperatures and humidity levels. January tends to be hotter, with average temperatures reaching 27°C (80°F) and a maximum of 39°C (102°F), while March has a slightly cooler average of 25°C (78°F) and a maximum of 36°C (97°F). Additionally, January experiences more precipitation, totaling 154 mm (6.1 in) over 16 days, compared to March, which sees 121 mm (4.8 in) over just 11 days. Humidity is higher in January at 82%, whereas March has a more comfortable level at 75%. For more insights into March's climate, check out Puerto Iguazu weather in March.
In January, the weather in Puerto Iguazu is characterized by high temperatures, with a minimum of 16°C (62°F) and an average of 27°C (80°F), reaching a sweltering maximum of 39°C (102°F). This month also experiences relatively high humidity at 82% and considerable precipitation, with 154 mm (6.1 in) falling over 16 days. In contrast, April brings more moderate temperatures, with a minimum of 8°C (47°F) and an average of 22°C (73°F), peaking at 35°C (95°F). The humidity drops to 74%, and precipitation decreases significantly to 105 mm (4.1 in) over just 6 days. For more detailed information, check out Puerto Iguazu weather in April.
In January, the weather is significantly warmer, with temperatures ranging from a minimum of 16°C (62°F) to a maximum of 39°C (102°F) and an average of 27°C (80°F). The month is also characterized by high humidity at 82% and substantial rainfall, with 154 mm (6.1 in) over 16 days. In contrast, May offers a much cooler climate, with temperatures ranging from 6°C (44°F) to 33°C (91°F) and an average of 19°C (67°F). Although May sees slightly less precipitation at 149 mm (5.9 in) over just 10 days, the humidity is lower at 75%. For more detailed information on weather conditions, check out Puerto Iguazu weather in May.
In January, the weather is characterized by high temperatures, with a minimum of 16°C (62°F) and averages reaching 27°C (80°F), peaking at a scorching 39°C (102°F). The month also sees significant rainfall, with 154 mm (6.1 in) spread over 16 days and high humidity at 82%. In contrast, June presents a much cooler climate, with minimum temperatures dropping to 2°C (36°F), average temperatures around 18°C (64°F), and maximums reaching 30°C (87°F). Although June has slightly less rainfall at 146 mm (5.7 in), it occurs over just 9 days, and the humidity is lower at 70%. For more details on the specific climate conditions in June, visit Puerto Iguazu weather in June.
January and July showcase a stark contrast in weather conditions. January offers warm temperatures with a minimum of 16°C (62°F) and peaks at 39°C (102°F), coupled with significant humidity at 82% and an average precipitation of 154 mm (6.1 in) over 16 days. In contrast, July experiences much cooler weather, with temperatures ranging from a low of 1°C (34°F) to an average of 17°C (63°F) and a maximum of 30°C (87°F). The humidity drops to 61%, and rainfall is significantly less, with only 43 mm (1.7 in) across just 6 days. For a detailed look at the weather in July, you can visit Puerto Iguazu weather in July.
January and August present strikingly different weather patterns. In January, temperatures soar with a minimum of 16°C (62°F) and a maximum reaching up to 39°C (102°F), accompanied by high humidity levels at 82% and significant rainfall of 154 mm (6.1 in) over 16 days. In sharp contrast, August showcases a cooler climate, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 34°C (94°F). The month experiences much less rainfall, totaling 76 mm (3.0 in) over only 6 days, and lower humidity at 49%. These differences highlight the seasonal variations in climate, making January a hot and humid month while August offers a more temperate and drier experience. For more details, you can check Puerto Iguazu weather in August.
January and September weather in Puerto Iguazu show a significant contrast in temperatures and humidity levels. In January, temperatures range from a minimum of 16°C (62°F) to a scorching maximum of 39°C (102°F), with an average of 27°C (80°F). The month is also characterized by high humidity at 82% and 154 mm (6.1 in) of precipitation spread over 16 days, making it one of the wettest months. In contrast, September experiences cooler temperatures, with a minimum of 9°C (49°F) and an average of 23°C (74°F), while still peaking at 39°C (102°F). Precipitation is significantly reduced to 78 mm (3.1 in) over just 6 days, accompanied by lower humidity at 52%. For more details on September weather, visit Puerto Iguazu weather in September.
When comparing the weather in January and October, significant differences emerge in temperature, precipitation, and humidity. In January, temperatures range from a minimum of 16°C (62°F) to a maximum of 39°C (102°F), with an average of 27°C (80°F), while October sees slightly cooler temperatures, with a minimum of 12°C (53°F), an average of 24°C (75°F), and a peak reaching 40°C (103°F). Precipitation is higher in October, totaling 171 mm (6.7 in) over 12 days, compared to January’s 154 mm (6.1 in) over 16 days. Additionally, January is much more humid, sitting at 82%, whereas October experiences a much drier feel with humidity at 55%. For more details on the October weather specifically, you can visit Puerto Iguazu weather in October.
In comparing the weather of January and November, January is typically hotter, with average temperatures ranging from a minimum of 16°C (62°F) to a maximum of 39°C (102°F), while November sees slightly cooler temperatures, with a range from 14°C (58°F) to 37°C (98°F). January also experiences higher humidity at 82%, compared to November's 73%, contributing to a more oppressive atmosphere. Additionally, January has more rainfall, accumulating 154 mm (6.1 in) over approximately 16 days, whereas November sees less precipitation at 118 mm (4.7 in) over about 9 days. For those looking to explore more about weather conditions during November, you can visit Puerto Iguazu weather in November.
In comparing the weather between January and December, January tends to be slightly warmer, with average temperatures reaching 27°C (80°F) compared to December's average of 26°C (79°F). January also experiences a higher maximum temperature of 39°C (102°F), while December peaks at 38°C (100°F). Both months see similar levels of precipitation, with January totaling 154 mm over 16 days and December slightly more at 155 mm over 11 days. Humidity levels are also high in both months, but January is marginally lower at 82% compared to December's 85%. For more details on December's specific weather conditions, you can visit Puerto Iguazu weather in December.
In January, Puerto Iguazu experiences hot and humid weather that stands out from the cooler, drier conditions of other months. With daily maximum temperatures often soaring above 39°C (102°F) and an average warmth around 27°C (80°F), visitors can expect a vibrant tropical atmosphere. However, this warmth is accompanied by significant precipitation, with rain gracing about half the month, leading to lush landscapes but also higher humidity levels around 82%. The combination of heat and moisture creates a dynamic environment perfect for exploring the stunning natural beauty the region offers. For more insights into the year-round climate, check out Puerto Iguazu Climate.