Last updated: August 21, 2025
Sao Sebastiao in December offers a mild tropical climate, perfect for those seeking warmth and beauty. With maximum temperatures reaching 31°C (88°F) and averaging around 24°C (75°F), visitors can expect pleasantly warm days. However, the month does bring significant precipitation, totaling 197 mm (7.7 in) over approximately 20 rainy days, resulting in a humidity level of 80% that adds to the lushness of the region. This combination of warmth and moisture makes December an enchanting time to experience the vibrant landscapes and coastal charm of Sao Sebastiao.
In December, São Sebastião, Brazil experiences a delightful transition into summer, with temperatures ranging from a mild 18°C (64°F) at night to a pleasant 31°C (88°F) during the day. As the year winds down, the average temperature settles around 24°C (75°F), inviting locals and visitors alike to soak up the sun and explore the beautiful coastline. This month marks a notable rise in warmth compared to the cooler months of April and May, signaling a shift towards warmer weather. Visitors can expect balmy evenings and sunny days perfect for beach activities, making December an ideal time to enjoy all that this vibrant coastal town has to offer.
In December, São Sebastião experiences a significant precipitation level of 197 mm (7.7 in), marking a notable transition from the preceding months. With 20 days of rainfall, the month showcases a consistent pattern of wet weather, aligning with the overall trend of increased precipitation during the year's end. This uptick in rainfall follows a relatively drier mid-year stretch, where July recorded just 63 mm (2.5 in) over 6 days. As the year wraps up, December serves as a reminder of the lush tropical climate that defines this coastal paradise, as holiday festivities coincide with the rhythmic dance of raindrops, nourishing the vibrant local flora.
In Sao Sebastiao, Brazil, December marks a transition as humidity levels rise back to 80% after a dip in the preceding months. Throughout the year, the tropical climate showcases a notable trend: humidity begins at a peak of 88% in January and February, gradually descending to its lowest point in October at 50%. However, as the year concludes, December signals a shift back toward the more humid conditions typical of the earlier months. This annual fluctuation highlights the region's seasonal variation, ensuring a balmy atmosphere as the festive season approaches.
In Sao Sebastiao, Brazil, December brings back an intense UV Index of 15, categorizing the sun exposure as extreme with a burn time of just 10 minutes. This peak level mirrors the indices seen in January and February, suggesting that the summer months are exceptionally harsh in terms of UV radiation. Notably, from March to April, there is a slight decrease, with UV levels still remaining in the extreme range. The UV Index then gradually lowers from 8 in May, to 6 in June, before climbing back to 11 by September. This indicates a significant seasonal variation, but the consistent return to extreme levels in the final months of the year warns residents and visitors alike to take necessary precautions. For more information on sun safety and UV exposure, check out Sao Sebastiao UV Index.
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December in São Sebastião, Brazil, heralds a radiant transition into summer, as the days stretch longer and brighter, boasting an impressive 324 hours of sunshine. This remarkable figure not only marks the highest monthly total of the year but also reflects a notable upward trend in sunshine hours as the year draws to a close. Following robust hours in November with 299 hours, December shines even brighter, underscoring a seasonal pattern where sunlight intensifies as temperatures rise. This abundant sunshine sets the perfect backdrop for holiday festivities, outdoor adventures, and the allure of the stunning coastline, making it an ideal time to embrace the enchantment of Brazilian summer.
In December, Sao Sebastiao experiences a 41% chance of sunny weather, marking a notable increase compared to the cloudier months earlier in the year. Following the warmer and sunnier peak in July with a 59% likelihood, the chances of sun gradually descend until November, where they dip to 38%. As the region transitions into December, residents and visitors can look forward to a modestly brighter month, striking a balance between the cooler late-year temperatures and the promise of clearer skies. Overall, while December isn't the sunniest month, it's part of a trend towards more favorable weather as the city basks in the joys of the summer season ahead.
In Sao Sebastiao, Brazil, the daylight duration reveals a captivating seasonal rhythm throughout the year. December shines brightly with 13 hours of daylight, matching January and November for the longest days. As the year progresses towards the summer months, daylight gradually decreases from a peak of 12 hours in February and March to a minimum of 10 hours from May to July, creating a more subdued atmosphere during winter. However, as spring approaches with the arrival of August, daylight begins to stretch again, returning to 11 hours. This dance of light and shadow not only enhances the beauty of Sao Sebastiao's landscapes but also invites locals and visitors alike to embrace the vibrant energy of the longer days as they gather to enjoy the beach and the stunning coastal scenery.
As December unfolds in São Sebastião, Brazil, the gentle caress of the wind ushers in a tranquil ambiance, with average wind speeds reaching 2.7 m/s (6 mph). This month experiences a slight dip in wind intensity compared to the breezier conditions of the preceding months, where October peaked at 4.1 m/s (9 mph). Such fluctuations reflect a gradual transition into the calmer winds of summer, following the breezy vitality of spring. Interestingly, the wind's rhythm throughout the year showcases a captivating pattern; it rises to a crescendo in the spring months of August and September before mellowing out in December, providing a serene backdrop for the festive season.
Weather in Sao Sebastiao varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sao Sebastiao, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing December and January weather in São Sebastião, December typically experiences slightly cooler temperatures with a minimum of 18°C (64°F) and an average of 24°C (75°F), whereas January sees a slight increase, with minimum temperatures around 20°C (69°F) and an average of 26°C (79°F). Precipitation levels are comparable, with December receiving 197 mm (7.7 in) across 20 days and January slightly higher at 206 mm (8.1 in) over 19 days. Humidity also rises in January to 88%, compared to 80% in December, making the weather feel a bit more humid as the new year begins. For more detailed insights, you can check Sao Sebastiao weather in January.
December and February exhibit similar warm climates, but February tends to be slightly more humid and wetter. In December, temperatures range from a minimum of 18°C (64°F) to a maximum of 31°C (88°F), with an average of 24°C (75°F) and a total precipitation of 197 mm (7.7 in) over 20 days. In contrast, February sees temperatures from a minimum of 20°C (68°F) up to 32°C (90°F), with an average of 25°C (77°F) and increased precipitation totaling 277 mm (10.9 in) over 21 days. Overall, February not only has slightly higher temperatures but also experiences increased humidity at 88% compared to December's 80%. For more details, check out Sao Sebastiao weather in February.
December and March exhibit quite similar warm temperatures, with December featuring a minimum of 18°C (64°F) and an average of 24°C (75°F), while March slightly raises these figures to a minimum of 19°C (66°F) and an average of 25°C (77°F). However, March tends to be wetter, accumulating 247 mm (9.7 in) of precipitation compared to December's 197 mm (7.7 in), both months experiencing rainfall on about 20 days. Additionally, March’s higher humidity at 87% makes the air feel more muggy compared to December's 80% humidity. For more detailed information on March weather in São Sebastião, you can visit Sao Sebastiao weather in March.
In December, the weather is warmer with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (88°F). This month sees significant precipitation, totaling 197 mm (7.7 in) over 20 days, accompanied by high humidity levels at 80%. In contrast, April features slightly cooler temperatures, with a low of 17°C (64°F), an average of 23°C (74°F), and a peak of 32°C (89°F). Precipitation in April is also less intense, reaching 125 mm (4.9 in) over 15 days, and humidity rises slightly to 84%. For more detailed information, visit Sao Sebastiao weather in April.
December and May exhibit notable differences in weather patterns. In December, temperatures range from a minimum of 18°C (64°F) to a maximum of 31°C (88°F), with an average of 24°C (75°F). This month also experiences higher precipitation, totaling 197 mm (7.7 in) over about 20 days, paired with a humidity level around 80%. In contrast, May features slightly cooler temperatures, with minimums of 14°C (57°F), maximums of 28°C (83°F), and an average of 21°C (70°F). Rainfall is significantly less in May, amounting to 119 mm (4.7 in) over just 11 days, while humidity remains relatively stable at 79%. For a closer look at the weather specifics, you can check out Sao Sebastiao weather in May.
December weather typically features warmer temperatures compared to June, with lows around 18°C (64°F) and highs reaching up to 31°C (88°F), while June offers a slightly cooler range, with temperatures dropping to a minimum of 15°C (60°F) and maxing out at 30°C (86°F). Additionally, December experiences higher precipitation, averaging 197 mm (7.7 in) over 20 days, in contrast to June's 100 mm (4.0 in) spread over just 12 days. Humidity levels are also comparable, with December at 80% and June slightly lower at 77%. For a more detailed look at June’s climate, you can check Sao Sebastiao weather in June.
In December, the weather is significantly warmer and more humid compared to July, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (88°F) and an average temperature of 24°C (75°F). The month experiences heavier rainfall, with a total precipitation of 197 mm (7.7 in) spread over 20 days, resulting in a humidity level of 80%. In contrast, July presents a cooler climate with temperatures ranging from 11°C (52°F) to 29°C (85°F), an average of 20°C (67°F), and only 63 mm (2.5 in) of precipitation over just 6 days, leading to a lower humidity level of 72%. For more details on the specific weather conditions in July, you can visit Sao Sebastiao weather in July.
December weather is noticeably warmer and more humid compared to August. With average temperatures reaching up to 24°C (75°F) and maximums hitting 31°C (88°F), December provides a balmy atmosphere. In contrast, August experiences cooler temperatures, with an average of 19°C (67°F) and minimums dropping to 13°C (56°F). Additionally, December sees higher precipitation, with 197 mm (7.7 in) over approximately 20 days, making it a wetter month than August, which only records 116 mm (4.6 in) across 11 days. This difference in humidity is also significant, with December at 80% compared to August's 65%. For more details on August weather, you can check Sao Sebastiao weather in August.
In comparing the weather conditions of December and September, December tends to be warmer and more humid. With daytime temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (88°F), December averages around 24°C (75°F) and boasts a high humidity level of 80%. However, it also brings a considerable amount of rainfall, averaging 197 mm (7.7 in) over about 20 days.
In contrast, September has cooler temperatures, with a minimum of 15°C (60°F) and a maximum of 34°C (93°F), resulting in an average temperature of 21°C (70°F). The month experiences significantly less precipitation, with only 95 mm (3.7 in) over approximately 11 days and lower humidity at 58%. For more detailed information about São Sebastião's weather in September, you can check this link: Sao Sebastiao weather in September.
In comparing the weather of December and October, we see notable differences in temperature and humidity. December experiences slightly higher average temperatures, ranging from a minimum of 18°C (64°F) to a maximum of 31°C (88°F), while October's temperatures range from 16°C (61°F) to a much warmer 36°C (96°F). This makes October the warmer month overall despite its lower average temperature. Additionally, December is characterized by significantly higher humidity at 80%, compared to October's 50%, contributing to a more muggy atmosphere. Precipitation also varies, with December receiving 197 mm (7.7 in) over 20 days, surpassing October’s 161 mm (6.3 in) over 19 days. For further details, you can explore Sao Sebastiao weather in October.
In December, temperatures in Sao Sebastiao show a slight increase compared to November, with minimums of 18°C (64°F) and averages rising to 24°C (75°F), while maximums remain consistent at 31°C (88°F). Precipitation also increases, with December receiving 197 mm (7.7 in) over 20 days, compared to November's 176 mm (6.9 in) over 18 days. Additionally, humidity is higher in December, averaging 80% compared to November's 75%. For a detailed look at the weather patterns, you can refer to Sao Sebastiao weather in November.
In December, Sao Sebastiao transforms into a vibrant coastal paradise, where the warmth intensifies with maximum temperatures reaching up to 31°C. This month sets itself apart from the rest of the year, boasting steamy conditions accompanied by a high humidity level of approximately 80%. However, it isn't all sunshine, as December also brings significant rainfall, with precipitation occurring on about 20 days, adding a refreshing touch to the tropical ambiance. Embrace the unique charm of December weather, which combines warmth, moisture, and a lush landscape, making it an ideal time to experience the beauty of this coastal gem. For more detailed insights into the weather trends, visit Sao Sebastiao Climate.