Last updated: August 21, 2025
In Blumenau, Brazil, the weather in December presents a vibrant mix of temperatures and humidity. The maximum temperature can soar up to 36°C (97°F), while the average remains a comfortable 23°C (73°F), offering a pleasant warm climate for outdoor activities. However, nights can cool down to a minimum of 12°C (54°F), providing a refreshing respite after a hot day. This month also sees significant precipitation, with an average of 192 mm (7.6 in) spread across 21 days, leading to a lush, green environment. With humidity levels at a high 88%, visitors should be prepared for a tropical experience that embodies the essence of summer in Brazil.
In Blumenau, Brazil, December marks a transition into the summer season, characterized by pleasantly warm temperatures. The month features a minimum of 12°C (54°F), providing a comfortable start to the day, while daytime highs can reach up to 36°C (97°F), perfect for outdoor activities and festive celebrations. With an average temperature of 23°C (73°F), December offers a delightful blend of warmth without the oppressive heat found in January. This trend of rising temperatures from November to December highlights the shift toward Brazil's vibrant summer, drawing both locals and tourists to enjoy the city's rich culture and stunning landscapes under the sun.
December in Blumenau, Brazil, ushers in a significant shift in precipitation patterns, culminating in an average rainfall of 192 mm (7.6 in) over 21 days. This month marks a continuation of the region's rainy season, following the downpour of November, which recorded 137 mm (5.4 in) across 20 days. Notably, December’s precipitation is higher than the prior month yet lower than the peak of January at 218 mm (8.6 in). This trend reflects the region's characteristic pattern of damp summers, where rainfall is not only plentiful but also frequently spreads over several days, contributing to the lush landscape and vibrant ecosystem that flourish in this subtropical climate. As the year concludes, Blumenau remains awash in moisture, setting the stage for the lush months ahead.
In Blumenau, Brazil, December marks a notable peak in humidity at 88%, continuing the trend of high moisture levels that dominate the region throughout the year. The humidity is consistently elevated from January through May, with figures hovering between 85% and 86%, before dipping slightly in the dryer months of July and August. However, the trend shifts as the year progresses, leading back to the moist climate characteristic of Blumenau in the latter months, where November and December top the scale. This seasonal fluctuation highlights the area's humid subtropical climate, culminating in a notably muggy December that prepares residents for the warm summer ahead.
In Blumenau, Brazil, the UV Index reaches its peak in December, matching January's extreme level of 15 and a minimal burn time of just 10 minutes. This consistency in high UV exposure reflects the region's summer conditions, where caution is paramount. Notably, the UV Index gradually decreases from March to June, slipping into a high category before climbing back up in September and sustaining extreme levels through November and December. Such trends underscore the necessity for sun protection year-round, but especially during these peak months. For more detailed UV Index information, visit Blumenau UV Index.
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In Blumenau, Brazil, December shines particularly bright with an impressive 301 hours of sunshine, marking the peak of the year for daylight. This festive month outshines the prior months, consistently capturing more sunlight than those leading up to it, particularly November, which had 273 hours. As the year transitions from the cooler winter days of June with 207 hours to the radiant summer, the trend shows a noticeable increase in sunshine hours. The warmer post-spring months of February and March also contribute significantly, averaging 278 and 282 hours, respectively, but December’s brilliance truly stands out, inviting locals and visitors alike to revel in the warmth and beauty of the Brazilian summer.
In Blumenau, Brazil, December brings a 31% chance of sunny weather, marking a notable increase from the preceding months. The sunny days begin to trend upward in late spring, with a gradual rise from just 22% in November. This uptick hints at the arrival of summer, as the likelihood of sunshine peaks in the following months, particularly in January, where it jumps to 14%. With its blend of warmth and occasional rain, December serves as a transitional month, preparing residents and visitors alike for the sun-kissed days ahead.
In Blumenau, Brazil, December marks a vibrant peak in daylight duration, offering an impressive 13 hours of sunlight each day. This bright month complements the gradual decline in daylight that begins in the late spring and continues through the fall, where daylight ranges from 12 hours in February and March to a minimum of 10 hours from May to July. As winter approaches in the southern hemisphere, the days begin to lengthen again in August, reaching back up to 11 hours by September and eventually climbing to 12 hours by the time October rolls around. This cyclical pattern showcases Blumenau's diverse climate, with December being a highlight, inviting warmth and extended hours to enjoy the outdoors.
As December settles in Blumenau, Brazil, the average wind speed reaches a consistent 2.0 m/s (4 mph), reflecting a noticeable trend of steady breezes throughout the year. Following a gradual increase from 1.5 m/s in March, wind speeds have climbed to this peak during the year’s final month, mirroring the trend seen in the preceding months of October and November. Notably, the wind is gentler in the warmer summer months compared to the slightly brisker fall and winter seasons, enhancing the charm of Blumenau's picturesque landscapes. The refreshing December winds invite both locals and visitors to enjoy outdoor activities while taking in the city's vibrant atmosphere.
Weather in Blumenau varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Blumenau, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is characterized by a wide temperature range, with minimums averaging around 12°C (54°F) and maximums reaching up to 36°C (97°F), complemented by high humidity levels of 88%. The month experiences significant rainfall, totaling 192 mm (7.6 in) over 21 days. In contrast, January brings slightly warmer temperatures, with minimums increasing to 16°C (61°F) and maximums peaking at 38°C (101°F), while the average temperature rises to 24°C (76°F). Precipitation also increases in January to 218 mm (8.6 in), but over just 20 days, bringing a slightly lower humidity level of 86%. For more detailed humidity and temperature trends, you can check Blumenau weather in January.
In December, the weather features a minimum temperature of 12°C (54°F) and an average of 23°C (73°F), reaching highs of 36°C (97°F). This month typically experiences significant precipitation, with 192 mm (7.6 in) falling over 21 days and humidity levels around 88%.
In contrast, February sees a slightly warmer average temperature of 24°C (75°F) while maintaining the same maximum temperature of 36°C (97°F) and a minimum of 12°C (54°F). Precipitation is slightly lower at 186 mm (7.3 in), spread over 19 days, and the humidity decreases to 83%. For more detailed insights into the February climate, visit Blumenau weather in February.
In December, the weather tends to be warmer, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 36°C (97°F) and an average of 23°C (73°F). The month also experiences higher precipitation, totaling 192 mm (7.6 in) over 21 days, coupled with high humidity at 88%. In contrast, March offers slightly cooler temperatures, with a minimum of 15°C (59°F) and a maximum of 33°C (93°F), while still maintaining an average of 23°C (74°F). Precipitation in March is lower at 160 mm (6.3 in) over 22 days and a slightly reduced humidity level of 85%. For more details on March weather, check out Blumenau weather in March.
In comparing the weather between December and April, December tends to be significantly warmer, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 36°C (97°F) and an average of 23°C (73°F). It is also characterized by high humidity levels at 88% and considerable precipitation, totaling 192 mm (7.6 in) over 21 days. In contrast, April offers cooler temperatures with a minimum of 8°C (47°F) and a maximum of 32°C (91°F), averaging 21°C (69°F). Additionally, April experiences less rainfall, with 90 mm (3.6 in) across 14 days, and slightly lower humidity at 85%. For more detailed insights into April’s weather, you can check Blumenau weather in April.
In December, the weather is characterized by warmer temperatures, with a minimum of 12°C (54°F), an average of 23°C (73°F), and a maximum of 36°C (97°F). This month sees significant rainfall, with precipitation reaching 192 mm (7.6 in) over 21 days and maintaining high humidity levels at 88%. In contrast, May experiences much cooler weather, with a minimum temperature of 5°C (41°F), an average of 18°C (65°F), and a maximum of 31°C (89°F). Precipitation is also lower in May, totaling 112 mm (4.4 in) across 13 days, with humidity slightly decreased at 86%. For more details on May weather, you can check Blumenau weather in May.
December and June present contrasting weather patterns. In December, temperatures range from a minimum of 12°C (54°F) to a maximum of 36°C (97°F), with an average of 23°C (73°F). This month also sees significant rainfall, totaling 192 mm (7.6 in) over 21 days, and high humidity at 88%. In contrast, June features cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 30°C (86°F), averaging 17°C (62°F). Rainfall is less frequent, amounting to 117 mm (4.6 in) over just 11 days, and humidity is slightly lower at 85%. For more specifics on June weather, check out Blumenau weather in June.
The weather in December and July presents a stark contrast. December boasts much warmer temperatures, with a minimum of 12°C (54°F) and an average high reaching up to 36°C (97°F). In addition, it experiences a high level of humidity at 88% and significant precipitation, totaling 192 mm (7.6 in) over 21 days. On the other hand, July features cooler conditions, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 30°C (87°F). It also sees considerably less rainfall, with only 48 mm (1.9 in) over just 8 days, while the humidity is slightly lower at 80%. For more detailed information about the climate, check out Blumenau weather in July.
When comparing the weather in December and August, a notable contrast emerges. December experiences warmer temperatures, with a minimum of 12°C (54°F) and average highs reaching up to 36°C (97°F), accompanied by high humidity levels at 88%. In contrast, August is significantly cooler, with temperatures ranging from a minimum of 2°C (36°F) to an average of 16°C (61°F) and maximums of 32°C (89°F). Additionally, August sees less precipitation at 73 mm (2.9 in) over 10 days compared to December's 192 mm (7.6 in) over 21 days. For more detailed insights, check Blumenau weather in August.
December weather in Blumenau is significantly warmer and more humid compared to September. With minimum temperatures of 12°C (54°F) and maximums reaching 36°C (97°F), December averages around 23°C (73°F), while September sees a cooler range with minimums at 6°C (44°F) and maximums of 31°C (87°F), resulting in an average temperature of 19°C (66°F). Additionally, December experiences more rainfall, accumulating 192 mm (7.6 in) over 21 days, compared to September's 115 mm (4.5 in) over 13 days. Humidity levels are also slightly higher in December at 88%, versus September's 82%. For more details on September's climate, check out Blumenau weather in September.
In comparing the weather between December and October, December tends to be noticeably warmer, with an average temperature of 23°C (73°F) compared to October's 20°C (68°F). Both months experience similar maximum temperatures, peaking at around 36°C (96-97°F). However, December sees more precipitation, with 192 mm (7.6 in) over 21 days, whereas October has 154 mm (6.1 in) over 19 days. Additionally, humidity levels are higher in December at 88% compared to 82% in October. For more details, visit Blumenau weather in October.
In comparing the weather of December and November, December tends to be slightly warmer, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 36°C (97°F), compared to November's range of 10°C (50°F) to 35°C (95°F). Additionally, December experiences higher precipitation, totaling 192 mm (7.6 in) over 21 days, whereas November sees 137 mm (5.4 in) across 20 days. Humidity levels are also a bit higher in December at 88%, compared to November's 86%. For more details about November's weather, you can visit Blumenau weather in November.
As December rolls into Blumenau, the weather takes on a vibrant character, marked by warm temperatures and high humidity that set it apart from other months. With an average temperature of 23°C (73°F), the month offers a pleasant escape from the winter chills, often peaking at a sizzling 36°C (97°F). However, this warmth comes with frequent rainfall, as December sees substantial precipitation across nearly three-quarters of the month. This blend of warmth and moisture contrasts sharply with the drier and cooler conditions experienced in other times of the year. For those looking to dive deeper into Blumenau's unique climatic patterns, explore Blumenau Climate.