Last updated: August 21, 2025
December in Foz do Iguaçu, Brazil brings a vibrant summer climate, marked by maximum temperatures soaring up to 38°C (100°F) and an inviting average of 26°C (79°F). As visitors explore the stunning natural beauty of the region, they can expect a mix of warmth and humidity, with levels around 85% creating a tropical ambiance. While the weather is generally warm, prepare for occasional showers, as the area experiences about 155 mm (6.1 in) of precipitation over 11 days. Embrace the lush landscapes and dynamic weather that define this exciting month in one of Brazil's most captivating destinations!
In December, Foz do Iguaçu wraps up the year with notably warm temperatures, providing a perfect backdrop for exploring its stunning natural wonders. The month begins with minimums around 14°C (58°F) and reaches an average of 26°C (79°F), peaking at a sizzling 38°C (100°F) on the hottest days. This trend of increasing warmth, seen since the beginning of summer in the Southern Hemisphere, invites visitors to indulge in outdoor activities and enjoy the lush surroundings. With temperatures gradually rising from the cooler months of the year, December's climate is ideal for experiencing the breathtaking Iguazu Falls, making it an attractive time to visit.
In Foz do Iguaçu, Brazil, December marks a notable increase in precipitation, with an average of 155 mm (6.1 in) over 11 days of rain. This is a slight uptick compared to November's 118 mm (4.7 in), suggesting that the region enters its wetter season as the year draws to a close. Notably, December's rainfall is among the highest of the year, closely following the peaks in January and October. The shift from the drier months of July and August, each receiving around 43 mm (1.7 in) and 76 mm (3.0 in), highlights December as a transitional month where humidity builds and the lush landscapes of the region come alive, setting the stage for the vibrant summer ahead.
In December, Foz do Iguaçu experiences a notable spike in humidity, reaching 85%, making it one of the most humid months of the year. This increase follows a trend observed throughout the year, where humidity begins to decline from January’s peak of 82% down to a low of 49% in August. As the year progresses into the warmer months, humidity levels start to rise again, culminating in December's high. The fluctuation reveals a clear seasonal pattern: starting off humid in the early year, hitting lows mid-year, and then surging as summer approaches, creating a sultry atmosphere that characterizes the lush landscapes of this vibrant Brazilian destination.
In December, Foz do Iguacu experiences a formidable UV Index of 14, placing it once again in the extreme exposure category with a burn time of just 10 minutes. This trend of high UV levels is consistent throughout the year, with the highest indices peaking in the early months, January and February, both recording a staggering 15. As the year progresses, a gradual decline is observed, but don’t let that fool you; even in the cooler months, such as June and July, the UV index remains noteworthy at 5 to 6, which necessitates caution. Overall, December's intense UV exposure underscores the importance of protection from the sun, making it essential for visitors and residents alike to stay vigilant. For more insights on daily UV exposure, check out Foz do Iguacu UV Index.
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As December rolls into Foz do Iguaçu, the city basks in an impressive 351 hours of sunlight, marking a vibrant close to the year. This delightful surge in hours stands out as the sunniest month, showcasing a clear upward trend in daylight as the year progresses. Following a notable increase through the late spring and early summer, where November experienced 319 hours, December's glow appears particularly inviting. With each month leading to this peak, Foz do Iguaçu invites visitors to embrace its natural beauty under the warm embrace of the tropical sun, making December an ideal time for exploration and relaxation.
December in Foz do Iguaçu brings an enticing 75% chance of sunny weather, making it one of the sunniest months of the year. This trend marks a notable increase compared to the earlier months, particularly when juxtaposed against the average sunshine in the preceding months, such as October at 42% and November at 55%. As the year winds down, the likelihood of clear skies not only enhances outdoor activities but also invites travelers to explore the stunning natural beauty that the region has to offer. With December being a peak time for sunshine, visitors can look forward to basking in the warmth of the Brazilian summer.
In Foz do Iguaçu, Brazil, the daylight duration exhibits a rhythmic seasonal dance, with December basking in the warmth of 13 hours of daylight, similar to its counterpart in January and November. This month marks the transition into summer, where the days reach their peak luminosity. As the year unfolds, daylight gradually diminishes from an extensive 13 hours in January to a more subdued 10 hours from May to July, reflecting the cooler winter months. Following August, daylight begins to reclaim its strength, returning to 11 hours in September and October. Thus, December serves as a vibrant reminder of the lush, sun-kissed days characteristic of Brazil's summer, offering ample opportunity to explore the stunning natural beauty this region has to offer.
As December arrives in Foz do Iguaçu, the winds calm slightly to an average speed of 2.4 m/s (5 mph). This gentle breeze, consistent with the patterns of the previous months, marks a subtle shift from the slightly stronger winds experienced in the late spring and early autumn. Notably, the wind speeds experience a gradual climb from the cooler months of May through October, peaking at 2.9 m/s (6 mph) in September before softening as the year winds down. As summer approaches, the predictable decline in wind speed creates a serene atmosphere that complements the breathtaking natural beauty of the region, inviting visitors to enjoy the mesmerizing landscapes of this Brazilian gem.
Weather in Foz do Iguacu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Foz do Iguacu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In Foz do Iguaçu, December weather features temperatures ranging from a minimum of 14°C (58°F) to a maximum of 38°C (100°F), with an average of 26°C (79°F) and relatively high humidity at 85%. The month receives about 155 mm (6.1 in) of precipitation over 11 days. In comparison, January exhibits slightly warmer conditions, with minimum temperatures at 16°C (62°F) and maximums reaching 39°C (102°F), alongside an average temperature of 27°C (80°F). Precipitation remains similar, totaling 154 mm (6.1 in), but it occurs over a greater number of days—16 in total—while humidity dips slightly to 82%. For more detailed information, you can check Foz do Iguacu weather in January.
When comparing the weather in December and February, we see some notable differences. December experiences slightly higher maximum temperatures, reaching up to 38°C (100°F), while February’s temperatures peak at 37°C (98°F). Both months maintain an average temperature of around 26°C (79°F), but December tends to be wetter, with 155 mm (6.1 in) of precipitation compared to February's 111 mm (4.4 in). Additionally, December has a higher humidity level of 85%, whereas February's humidity drops to 79%. For a more detailed look at February weather in the region, you can check this link: Foz do Iguacu weather in February.
In December, the weather in Foz do Iguacu tends to be warmer, with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 38°C (100°F). The humidity levels are high at 85%, leading to a feeling of increased warmth. Additionally, December experiences more precipitation, averaging 155 mm (6.1 in) over 11 days.
In contrast, March sees slightly cooler temperatures, with averages between 13°C (55°F) and 36°C (97°F). The humidity decreases to 75%, creating a more comfortable atmosphere, and total precipitation is lower at 121 mm (4.8 in) over the same number of days. For more detailed information on weather patterns during this month, check Foz do Iguacu weather in March.
In December, the weather is significantly warmer, with temperatures ranging from a minimum of 14°C (58°F) to a scorching maximum of 38°C (100°F). This month also brings about higher humidity at 85% and more substantial rainfall, with a total of 155 mm (6.1 in) spread across 11 days. In contrast, April experiences milder conditions with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 35°C (95°F). The precipitation is lower in April, totaling 105 mm (4.1 in) over just 6 days, and the humidity drops to 74%. For a more detailed look at April's weather specifics, check out Foz do Iguacu weather in April.
In December, Foz do Iguacu experiences a much warmer climate, with temperatures ranging from a minimum of 14°C (58°F) to a scorching maximum of 38°C (100°F) and an average of 26°C (79°F). The humidity is quite high at 85%, contributing to the overall muggy feel, along with significant precipitation of 155 mm (6.1 in) spread over 11 days. In contrast, May brings a more temperate climate with temperatures ranging from a cool minimum of 6°C (44°F) to a pleasant maximum of 33°C (91°F), averaging at 19°C (67°F). Precipitation remains similar at 149 mm (5.9 in), but occurs over just 10 days, and the humidity drops to a more comfortable 75%. For more detailed insights, you can check Foz do Iguacu weather in May.
In December, the weather is notably warmer, with temperatures ranging from a minimum of 14°C (58°F) to a scorching maximum of 38°C (100°F), and an average temperature of 26°C (79°F). The month experiences high humidity at 85% and significant precipitation, totaling 155 mm (6.1 in) over 11 days. In contrast, June offers a much cooler climate, with temperatures varying from a low of 2°C (36°F) to a high of 30°C (87°F) and an average of 18°C (64°F). Precipitation is slightly lower in June at 146 mm (5.7 in) over 9 days, accompanied by a more comfortable humidity level of 70%. For more details on the weather conditions specific to this month, you can check Foz do Iguacu weather in June.
December and July present stark contrasts in weather. In December, temperatures soar from a minimum of 14°C (58°F) to a blistering maximum of 38°C (100°F), with an average of 26°C (79°F). This month is characterized by high humidity at 85% and significant rainfall, totaling 155 mm (6.1 in) over 11 days. In contrast, July experiences milder conditions, with temperatures ranging from a cool 1°C (34°F) at night to a maximum of 30°C (87°F), averaging around 17°C (63°F). The humidity is notably lower at 61%, and precipitation is minimal, with just 43 mm (1.7 in) over 6 days. For more specific details on July weather, you can check Foz do Iguacu weather in July.
December and August present a stark contrast in weather conditions. In December, temperatures soar, with averages ranging from a comfortable 26°C (79°F) to peak highs of 38°C (100°F), accompanied by high humidity levels at 85%. This month also sees significant rainfall, with about 155 mm (6.1 in) over 11 days, making it one of the wettest periods of the year. In contrast, August experiences much cooler temperatures, where the average hovers around 19°C (66°F), with a minimum of 3°C (38°F) and a maximum of 34°C (94°F). Precipitation is notably lower, at 76 mm (3.0 in) over just 6 days, and humidity sits at a much drier 49%. For more detailed information, you can check Foz do Iguacu weather in August.
When comparing the weather in December and September, significant differences become evident. December generally presents warmer temperatures with a minimum of 14°C (58°F) and an average of 26°C (79°F), while September features cooler conditions, starting at 9°C (49°F) and averaging 23°C (74°F). Interestingly, both months can experience high maximum temperatures, though September's peak can reach up to 39°C (102°F), slightly surpassing December's maximum of 38°C (100°F).
In terms of precipitation, December is notably wetter, receiving 155 mm (6.1 in) over 11 days, in contrast to September's 78 mm (3.1 in) over just 6 days. Additionally, the humidity in December is significantly higher at 85%, compared to 52% in September. For more detailed insights into the weather during this time, you can visit Foz do Iguacu weather in September.
In comparing the weather between December and October, we can see a few notable differences. December tends to be slightly warmer, with average temperatures reaching 26°C (79°F) compared to October's 24°C (75°F). However, October boasts a higher maximum temperature of 40°C (103°F), while December peaks at 38°C (100°F). Precipitation is also slightly more abundant in October, with 171 mm (6.7 in) over 12 days, versus December's 155 mm (6.1 in) over 11 days. Additionally, humidity levels are significantly higher in December at 85%, compared to October's more comfortable 55%. For more detailed information, you can check out Foz do Iguacu weather in October.
In comparing the weather of December and November in Foz do Iguacu, we see that temperatures remain quite consistent, with December having a slightly higher average maximum temperature of 38°C (100°F) compared to November's 37°C (98°F). Both months feature a minimum temperature of 14°C (58°F), but December's average temperature is slightly warmer at 26°C (79°F)—just one degree higher than November's 25°C (77°F).
Precipitation levels increase in December, with 155 mm (6.1 in) falling over 11 days, compared to November's 118 mm (4.7 in) over 9 days. This rise in precipitation is accompanied by a notable jump in humidity, soaring to 85% in December from November's 73%. For more detailed insights, you can check Foz do Iguacu weather in November.
As December descends upon Foz do Iguacu, the weather transforms into a warm embrace that's distinctly different from the other months. With balmy average temperatures of 26°C, the days invite outdoor adventures, though the potential for maximum highs reaching a sizzling 38°C adds an exciting layer of warmth. Contrast this with occasional bursts of rainfall—averaging 155 mm across 11 days—which typically refreshes the lush surroundings. The heightened humidity at 85% can make the atmosphere feel more intense, contributing to that characteristic tropical vibe. For those keen on exploring further details about the climate, visit Foz do Iguacu Climate to prepare for your adventure.