Last updated: August 21, 2025
December in Puerto Iguazu, Argentina brings a warm and humid climate, ideal for those seeking a tropical escape. Temperatures soar with a maximum reaching 38°C (100°F) and an average of 26°C (79°F), while nights cool down to a pleasant 14°C (58°F). Visitors should be prepared for occasional rain, as the area experiences about 155 mm (6.1 in) of precipitation over 11 days throughout the month. With humidity levels hovering around 85%, the lush surroundings are vibrant and inviting, making December a captivating time to explore the stunning natural beauty of Iguazu Falls and its lush rainforest.
In December, Puerto Iguazu experiences warm and inviting temperatures, with minimums around 14°C (58°F) and a delightful average of 26°C (79°F). As the month progresses, highs can soar to 38°C (100°F), making it an ideal time for outdoor adventures and exploring the breathtaking Iguazu Falls. This trend of increasing warmth is in line with the summer months that follow, reflecting a gradual rise from the cooler temperatures of earlier months. December serves as a perfect bridge, offering a comfortable climate that encourages both relaxation and exploration in this stunning region of Argentina.
December in Puerto Iguazu sees a generous precipitation amount of 155 mm (6.1 in), marking the end of the year with one of the highest rainfall totals, akin to January’s figures. With an average of 11 rainy days, this month embraces the lushness that characterizes the region, setting the stage for vibrant landscapes. Following a pattern of increasing rainfall from the drier months of July and August, December’s precipitation mirrors the earlier spikes seen in October and May, indicating the onset of the summer rains. As the year wraps up, the consistent presence of rainfall not only nourishes the lush greenery but also invigorates the breathtaking waterfalls that Puerto Iguazu is renowned for, making it a spectacular time to experience the natural beauty of this enchanting destination.
In Puerto Iguazu, Argentina, December ushers in a significant uptick in humidity, reaching a notable 85%, the highest level of the year. As the peak of the summer season, the humidity exhibits a marked increase from the preceding months, notably rising from 73% in November. This trend highlights a gradual climb in moisture levels, particularly vibrant as the year progresses, starting from a comfortable 82% in January down to a low of 49% in August. The shift in humidity patterns underscores the region's tropical climate, where the lush landscapes thrive under the warm, humid conditions of December, setting the stage for vibrant flora and bustling ecosystems.
In December, Puerto Iguazu, Argentina, experiences a UV Index of 14, placing it firmly in the extreme exposure category with a burn time of just 10 minutes. This trend of high UV levels in the region is consistent with the preceding months, where values often peaked at 15. From January to November, the UV Index fluctuated between extreme and very high levels, emphasizing the need for sun safety throughout the year. As a popular travel destination filled with stunning natural wonders, visitors to Puerto Iguazu should remain vigilant about sun exposure and take the necessary precautions. For detailed insights into the UV Index in this vibrant locale, explore Puerto Iguazu UV Index.
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In December, Puerto Iguazu basks in an impressive 351 hours of sunshine, marking it as the sunniest month of the year. This vibrant city, nestled at the borders of Argentina, Brazil, and Paraguay, experiences a gradual increase in daylight as the year progresses. Following November's generous 319 hours, December’s radiant days invite visitors to explore its stunning natural wonders, including the iconic Iguazu Falls. The trend of lengthening sunshine hours not only enhances outdoor adventures but also boosts the festive atmosphere as the holiday season approaches. With sunshine peaking, December epitomizes the warmth and beauty of the Argentinian summer.
In Puerto Iguazu, December brings a delightful shift in weather patterns, as the likelihood of sunny days reaches an impressive 75%. This marks a significant uptick compared to the preceding months, demonstrating a consistent trend towards brighter skies as the year wraps up. After a year that oscillates between moderate sunshine and cloudier periods, December stands out as a beacon of warmth and brightness, surpassing even the sunniest months like February and July. With the festive season approaching, visitors can expect more opportunities to enjoy the breathtaking natural beauty of the area under the glorious sun, embodying the best of summer in Argentina.
December in Puerto Iguazu, Argentina, marks the peak of summer, offering a delightful 13 hours of daylight. This extended sunlight is a continuation of the trend seen in November, where locals and tourists alike can bask in the warmth of longer days. Following the steady decline from the sunniest months of January and February, which also enjoy 13 and 12 hours of daylight respectively, December's brightness heralds a vibrant start to the summer season. As the year progresses into the autumn months, daylight hours gradually decrease, hitting a low of 10 hours from May through July. This cyclical pattern not only influences daily activities but also enhances the lush natural beauty of the region, making each moment spent in Puerto Iguazu during December a truly enchanting experience.
As December unfolds in Puerto Iguazu, Argentina, a gentle breeze graces the landscape with an average wind speed of 2.4 m/s (5 mph). This marks a slight decline from the slightly breezier months of September and August, where winds reached up to 2.9 m/s (6 mph). Throughout the year, the wind speeds remain relatively stable, hovering around the calm yet refreshing levels typical of this tropical region. As the year winds down, thus inviting the festive season, December’s gentle winds create a serene atmosphere, perfect for exploring the breathtaking natural wonders of Iguazu Falls, where even the softest breezes seem to dance with the cascading waters.
Weather in Puerto Iguazu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Puerto Iguazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between December and January, we see only slight variations in temperature and precipitation. December experiences a minimum temperature of 14°C (58°F) and an average of 26°C (79°F), while January's low is slightly higher at 16°C (62°F) with an average of 27°C (80°F). Both months reach similar maximum temperatures, with December peaking at 38°C (100°F) and January slightly warmer at 39°C (102°F). Precipitation levels are comparable, with December receiving 155 mm (6.1 in) over 11 days and January seeing just a bit more, at 154 mm (6.1 in) over 16 days. Humidity remains high, averaging 85% in December and slightly decreasing to 82% in January. For further details, check out Puerto Iguazu weather in January.
In December, temperatures in Puerto Iguazu range from a minimum of 14°C (58°F) to a maximum of 38°C (100°F), with an average of 26°C (79°F). This month experiences significant precipitation, averaging 155 mm (6.1 in) over 11 days, along with high humidity levels at 85%. In contrast, February sees only a slight increase in minimum temperature, reaching 15°C (59°F), while maximum temperatures slightly decrease to 37°C (98°F), maintaining the same average of 26°C (79°F). February also has less precipitation, with 111 mm (4.4 in) over the same number of rainy days, resulting in lower humidity at 79%. For more specific details, you can check the Puerto Iguazu weather in February.
In December, the weather is typically hotter than in March, with average temperatures reaching 26°C (79°F) and maximums often soaring to 38°C (100°F). In contrast, March features slightly cooler temperatures, averaging 25°C (78°F) and peaking at 36°C (97°F). Both months experience similar levels of precipitation, with December receiving 155 mm (6.1 in) over 11 days, while March sees 121 mm (4.8 in) also over 11 days. Humidity is notably higher in December at 85%, compared to March's 75%, making December feel more muggy and uncomfortable. For more detailed insights, check out Puerto Iguazu weather in March.
In December, the weather is significantly warmer, with minimum temperatures around 14°C (58°F) and maximums reaching 38°C (100°F), while April features milder temperatures, ranging from a minimum of 8°C (47°F) to a maximum of 35°C (95°F). December also sees more precipitation, averaging 155 mm (6.1 in) over 11 days, compared to April's 105 mm (4.1 in) spread over just 6 days. Additionally, the humidity in December is higher, averaging 85%, whereas April’s humidity is more comfortable at 74%. For more detailed information, you can refer to Puerto Iguazu weather in April.
In December, the weather tends to be much warmer and more humid compared to May, with average temperatures ranging from a minimum of 14°C (58°F) to a scorching maximum of 38°C (100°F). December experiences considerable precipitation, with about 155 mm (6.1 in) over 11 days, and humidity levels reaching 85%, creating a tropical atmosphere. In contrast, May sees milder temperatures, with an average ranging from 6°C (44°F) to a maximum of 33°C (91°F), and slightly lower precipitation of 149 mm (5.9 in) over 10 days. The humidity in May is also less intense at 75%, resulting in a more comfortable climate. For more detailed weather information, you can visit Puerto Iguazu weather in May.
In December, temperatures can soar between a minimum of 14°C (58°F) and a scorching maximum of 38°C (100°F), with an average of 26°C (79°F). This month is characterized by high humidity at 85% and substantial rainfall, totaling 155 mm (6.1 in) over 11 days. In contrast, June experiences much cooler conditions, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 30°C (87°F) and an average of 18°C (64°F). Rainfall is slightly lower at 146 mm (5.7 in), occurring over 9 days, and the humidity is more moderate at 70%. For more detailed information, check out Puerto Iguazu weather in June.
December and July present contrasting weather patterns. December experiences much warmer temperatures, with a minimum of 14°C (58°F), an average of 26°C (79°F), and a maximum of 38°C (100°F). This month is also characterized by higher humidity at 85% and more frequent precipitation, totaling 155 mm (6.1 in) over 11 days. In contrast, July has cooler temperatures, with a minimum of 1°C (34°F), an average of 17°C (63°F), and a maximum of 30°C (87°F). Precipitation is significantly lower, reaching only 43 mm (1.7 in) on about 6 days and a reduced humidity level of 61%. For more details on July weather specifically, you can visit Puerto Iguazu weather in July.
December and August offer contrasting weather experiences in Puerto Iguazu. In December, temperatures soar with a minimum of 14°C (58°F) and can reach up to a sweltering maximum of 38°C (100°F), accompanied by high humidity at 85%. This month also sees significant rainfall, averaging 155 mm over 11 days. In stark contrast, August brings cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 34°C (94°F), while experiencing much less precipitation at 76 mm over just 6 days and lower humidity at 49%. For a detailed look at what to expect during this time, you can refer to Puerto Iguazu weather in August.
When comparing the weather in December and September, several notable differences emerge. December boasts a warmer temperature range, with minimums around 14°C (58°F), average highs of 26°C (79°F), and peaks reaching 38°C (100°F). In contrast, September features cooler temperatures, with minimums of 9°C (49°F) and an average of 23°C (74°F), while still reaching a maximum of 39°C (102°F). Additionally, December experiences higher precipitation, totaling 155 mm (6.1 in) over about 11 days, compared to September's 78 mm (3.1 in) over just 6 days. Humidity levels also differ significantly, with December seeing a high of 85%, while September's humidity is much lower at 52%. For more details on September weather specifically, you can refer to Puerto Iguazu weather in September.
When comparing the weather in December and October, December tends to be slightly warmer, with an average temperature of 26°C (79°F) compared to October's 24°C (75°F). However, October records a higher maximum temperature of 40°C (103°F), while December peaks at 38°C (100°F). Both months experience significant rainfall, with December accumulating 155 mm (6.1 in) over 11 days and October seeing 171 mm (6.7 in) across 12 days. Interestingly, October has a noticeably lower humidity level at 55%, whereas December's humidity climbs to a higher 85%, contributing to a more muggy atmosphere. For more information on weather patterns, check out Puerto Iguazu weather in October.
In comparing the weather between November and December, both months experience similar minimum temperatures, with December slightly warmer on average. December boasts an average temperature of 26°C (79°F) compared to November's 25°C (77°F), and the maximum temperatures in December can reach up to 38°C (100°F), while November tops out at 37°C (98°F). However, December sees increased precipitation, measuring 155 mm (6.1 in) over 11 days, compared to 118 mm (4.7 in) across 9 days in November, making it a wetter month overall. Additionally, humidity levels rise significantly in December, averaging 85% compared to November's 73%. For more insights on November weather, you can visit Puerto Iguazu weather in November.
As the year winds down, Puerto Iguazu embraces the warmth of December with its hot temperatures and high humidity, creating a vibrant and lush atmosphere. Unlike the cooler months that precede it, December often sees sweltering days that can reach a scorching 38°C, inviting visitors to explore the area's natural wonders. However, expect occasional downpours, with an average of 11 rainy days throughout the month, reminding us of the rainforest's lushness. Experiencing Puerto Iguazu's December weather is a unique opportunity to witness the region at its most vibrant. For a more in-depth look at how December fits into the broader climate patterns, check out Puerto Iguazu Climate.