Last updated: August 21, 2025
Experience the vibrant December weather of São Francisco do Sul, Brazil, where temperatures can soar up to a balmy 36°C (96°F), settling into a comfortable average of 24°C (75°F). As the festive season approaches, prepare for a splash of rain, with 209 mm (8.2 in) of precipitation expected across 21 days, creating a humid backdrop at 88%. This tropical climate offers a unique blend of warmth and occasional showers, perfect for both beach lovers and those seeking to explore the lush landscapes of this coastal gem.
In Sao Francisco do Sul, Brazil, December marks the transition into summer warmth, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F). The average temperature hovers around 24°C (75°F), providing a cozy warmth that invites both locals and tourists to enjoy outdoor activities. As the year winds down, the trend shows a gradual warming trend from the cooler months, which typically feature lower averages. Compared to prior months, December's temperatures not only signify a continuation of the warming pattern seen since spring but also create the perfect backdrop for festive celebrations and beach outings as the city embraces its vibrant summer climate.
In December, São Francisco do Sul experiences a notable uptick in precipitation, recording 209 mm (8.2 in) of rainfall over 21 days. This marks a slight increase from November's 145 mm, signaling the onset of the rainy season that often characterizes the Brazilian summer. While the rainfall amount is lower than January's peak of 264 mm, December still showcases an abundance of moisture, setting the stage for lush landscapes as the year comes to a close. This trend of increasing precipitation from late spring into summer reflects the region's dynamic climate, where each month can bring varied weather patterns, ultimately enhancing the natural beauty of this coastal paradise.
In December, Sao Francisco do Sul experiences a notable peak in humidity, reaching a comfortable 88%. This rise is part of a larger trend observed throughout the year, where humidity levels generally hover between 79% and 86%. The month of December stands out, showing a slight increase from November's 86%, indicating a shift towards the more humid conditions typical of the Brazilian summer. As the year progresses, humidity tends to decline from mid-year lows—most evident in July and August, when it dips to 80% and 79%, respectively—before regaining momentum in the later months. This cyclical pattern reflects the region's tropical climate, making December a particularly clammy yet vibrant time in this coastal city.
In December, Sao Francisco do Sul experiences an intense UV Index of 15, categorizing it as extreme with a quick burn time of just 10 minutes. This peak in UV levels mirrors a consistent trend seen throughout the year, especially in the summer months of January and February, where the UV Index also reaches 15 and 14 respectively. As the year progresses, the intensity slightly decreases, but the exposure remains high, particularly from October to February, where caution is advised against prolonged sun exposure. Even as conditions mellow in the cooler months, with UV levels dropping to 6 in June and July, it's important for residents and visitors to stay informed about fluctuating UV levels. For detailed insights, visit Sao Francisco do Sul UV Index.
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In December, Sao Francisco do Sul baskes in a glorious 318 hours of sunshine, marking the peak of its sunny season. This month stands out not only as the sunniest of the year but also as a delightful culmination of a gradual upward trend in daylight hours. Since a modest 240 hours in January, the sunlight has steadily increased through the months, peaking in November with 296 hours. This bright finale invites residents and visitors alike to embrace the warmth and joy of summer, underscoring the area’s appeal as a vibrant destination during the festive season. With such an abundance of sunshine, December truly shines as a perfect time to enjoy the coastal beauty and lively atmosphere of this charming Brazilian town.
In December, the likelihood of sunny weather in São Francisco do Sul is relatively modest, with a 28% chance of sunshine. This places it halfway between the more cloudy months of October (12%) and November (24%), suggesting a subtle improvement as summer approaches. Compared to the earlier months, December doesn’t feature the high percentages of sunlight seen in mid-winter, particularly July, which boasts a robust 57% chance. As the year draws to a close, the gradual transition towards brighter weather begins, hinting that while December may not be the sunniest month, it offers a glimpse of the more favorable conditions to come in the New Year.
In Sao Francisco do Sul, Brazil, the rhythm of daylight reveals a captivating annual cycle. As the year begins, January welcomes an abundance of 13 hours of daylight, setting a bright tone that continues into February. Gradually, the hours of sunlight dip to 12 hours in both February and March, before reaching a low of 10 hours in the heart of winter during May, June, and July. However, as spring approaches, daylight begins its ascent once more, peaking again at 13 hours by November and holding steady in December. This gentle ebb and flow not only highlights the changing seasons but also paints a picture of life in Sao Francisco do Sul, where each month brings its own light-filled character.
As December arrives in São Francisco do Sul, the coastal winds begin to pick up, reaching an average speed of 2.2 m/s (5 mph). This marks a gradual increase from the lighter breezes experienced earlier in the year, particularly from January to November, where winds hovered around 1.6 to 2.2 m/s (4 to 5 mph). The consistent trend of slightly stronger winds from September onward hints at the onset of summer in this vibrant part of Brazil, offering a perfect backdrop for outdoor activities and scenic coastal views. With the year wrapping up, these refreshing winds add a lively touch to December, inviting both locals and visitors to enjoy the beauty of the season.
Weather in Sao Francisco do Sul varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sao Francisco do Sul, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather in Sao Francisco do Sul is characterized by warm temperatures, ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), with an average temperature of 24°C (75°F). The month experiences significant rainfall, totaling 209 mm (8.2 in) over 21 days, coupled with a high humidity level of 88%.
In contrast, January tends to be slightly warmer, with minimum temperatures of 18°C (64°F) and maximums reaching 38°C (101°F), resulting in a higher average of 26°C (78°F). Rainfall is also more abundant in January, with precipitation amounts increasing to 264 mm (10.4 in) over the same number of days, and humidity remains relatively high at 86%.
For more detailed insights, you can refer to Sao Francisco do Sul weather in January.
In December, the weather is characterized by warm temperatures, with a minimum of 15°C (59°F), an average of 24°C (75°F), and a peak of 36°C (96°F). This month also sees substantial precipitation, totaling 209 mm (8.2 in) over 21 days, accompanied by high humidity levels of 88%.
Conversely, February experiences slightly warmer conditions, with a minimum temperature of 16°C (60°F) and an average of 25°C (77°F), while still reaching a maximum of 36°C (98°F). The rainfall is marginally less, at 204 mm (8.0 in) over the same number of days, and the humidity drops to 83%.
For more detailed information, you can check Sao Francisco do Sul weather in February.
When comparing the weather in December and March, both months exhibit warm temperatures, though December tends to feature slightly higher maximums, peaking at 36°C (96°F) compared to March's maximum of 35°C (94°F). December also sees a higher average temperature and a noticeable increase in rainfall, with 209 mm (8.2 in) of precipitation over 21 days, while March experiences 199 mm (7.9 in) across 25 days. Humidity levels remain relatively high in both months, with December at 88% and March slightly lower at 85%. For more detailed insights on March weather, you can visit Sao Francisco do Sul weather in March.
When comparing the weather between December and April, December is notably warmer with average temperatures reaching up to 24°C (75°F) and maximums soaring to 36°C (96°F), in contrast to April's more moderate average of 22°C (72°F) and maximums of 34°C (93°F). Additionally, December experiences more rainfall, with 209 mm (8.2 in) over 21 days, whereas April sees only 108 mm (4.3 in) across 15 days, leading to slightly lower humidity levels in April at 85% compared to December's 88%. For a more detailed overview of conditions in April, you can check out Sao Francisco do Sul weather in April.
In December, temperatures in Sao Francisco do Sul range from a minimum of 15°C (59°F) to a scorching maximum of 36°C (96°F), with an average of 24°C (75°F). This month is characterized by high humidity at 88% and significant rainfall, receiving about 209 mm (8.2 inches) over 21 days. In contrast, May experiences cooler temperatures, with a minimum of 7°C (45°F) and a maximum of 31°C (88°F), averaging 20°C (67°F). The precipitation is lighter in May, totaling 112 mm (4.4 inches) across 15 days, and the humidity is slightly lower at 86%. For more detailed information about the weather specifics in May, check out Sao Francisco do Sul weather in May.
December and June present quite different weather patterns. In December, temperatures soar with a minimum of 15°C (59°F) and can peak at 36°C (96°F), averaging around 24°C (75°F). This month also brings significant rainfall, totaling 209 mm (8.2 in) over 21 days, accompanied by high humidity levels of 88%. In contrast, June features cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 31°C (88°F), averaging a milder 18°C (65°F). The precipitation is notably less in June, at 108 mm (4.3 in) over just 11 days, and the humidity remains relatively high at 85%. For more specific information, you can check Sao Francisco do Sul weather in June.
In December, Sao Francisco do Sul experiences a significantly warmer climate, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F) and an average of 24°C (75°F). The month sees considerable rainfall, with 209 mm (8.2 in) of precipitation spread over 21 days, and the humidity is notably high at 88%. In contrast, July brings much cooler weather, with temperatures dipping to a minimum of 3°C (37°F) and peaking around 31°C (88°F), averaging 17°C (63°F). Rainfall is considerably less frequent, with only 33 mm (1.3 in) of precipitation over 7 days, and humidity levels at 80%. For more details, you can check Sao Francisco do Sul weather in July.
December and August weather display distinct differences in temperature and precipitation patterns. In December, temperatures range from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), with an average temperature of 24°C (75°F). This month experiences significant rainfall, with 209 mm (8.2 in) spread over 21 days and high humidity at 88%. In contrast, August is much cooler, featuring temperatures that range from a minimum of 5°C (41°F) to a maximum of 31°C (88°F), with an average of 18°C (64°F). Rainfall in August is considerably lower, reaching 70 mm (2.7 in) over just 10 days, and the humidity sits at 79%. For more detailed information about the weather in August, visit Sao Francisco do Sul weather in August.
December and September showcase distinctly different weather patterns. In December, temperatures range from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), with an average temperature of 24°C (75°F), making it noticeably warmer. This month also experiences higher humidity at 88% and significantly more rainfall, totaling 209 mm (8.2 in) over approximately 21 days. In contrast, September features milder temperatures, with a minimum of 9°C (49°F) and a maximum of 31°C (87°F), resulting in an average of 20°C (68°F). The precipitation is lower at 106 mm (4.2 in) over 14 days, accompanied by a slightly lower humidity level of 82%. For more detailed information about September weather, you can visit Sao Francisco do Sul weather in September.
Comparing the weather in December and October reveals some intriguing differences. In December, the temperature ranges from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), with an average temperature of 24°C (75°F), while October has slightly cooler temperatures, with a minimum of 12°C (54°F), an average of 21°C (70°F), and a maximum of 37°C (99°F). Precipitation is higher in December with 209 mm (8.2 in) over 21 days, compared to October's 166 mm (6.5 in) over 20 days. Additionally, December is more humid at 88%, compared to October’s 82%. For more details on October weather, you can visit Sao Francisco do Sul weather in October.
In December, the weather is slightly warmer compared to November, with average temperatures ranging from a minimum of 15°C (59°F) to a maximum of 36°C (96°F), as opposed to November's range of 13°C (56°F) to 35°C (95°F). December also experiences more precipitation, with 209 mm (8.2 in) falling over 21 days, compared to November's 145 mm (5.7 in) over the same number of days. Humidity is marginally higher in December at 88%, compared to November's 86%. For more detailed insights on November weather, check out this link: Sao Francisco do Sul weather in November.
December in Sao Francisco do Sul brings a vibrant transition into the summer months, distinguishing itself from other times of the year with warm temperatures and increased humidity. While the afternoons may reach a sultry 36°C, the evenings offer a cooler respite. This month heralds the start of the rainy season, with precipitation occurring on about 21 days, contributing to an overall 209 mm of rainfall. With humidity levels soaring to 88%, the air feels rich and tropical, making December a unique experience compared to the dryer and cooler previous months. To delve deeper into what each month has to offer, you can explore the detailed trends at Sao Francisco do Sul Climate.