Last updated: August 21, 2025
Experience the vibrant weather of Sao Sebastiao, Brazil in December, where the warm sun graces the coast with maximum temperatures reaching 36°C (97°F) and a comfortable average of 27°C (81°F). While the days are predominantly sunny, expect occasional rain, with about 28 mm (1.1 in) of precipitation spread over 8 days. With humidity levels around 76%, the atmosphere feels lush and tropical, perfect for beachgoers and adventurers alike. Embrace the warmth and rich climate as you explore this beautiful coastal city.
In December, São Sebastião, Brazil, welcomes summer with warm, balmy temperatures that set the stage for sun-soaked days. The month typically sees a minimum temperature of 22°C (72°F), climbing to an average of 27°C (81°F), and peaking at a sizzling 36°C (97°F). This upward trend emphasizes the transition into the hottest part of the year, mirroring consistent patterns observed since January. With each passing month, the warmth intensifies, making December an ideal time for beachgoers and outdoor enthusiasts eager to embrace the vibrant energy of Brazilian summer. The climate invites visitors to indulge in leisurely afternoons by the coast, enjoying both the scenic beauty and the tropical allure of this stunning destination.
In December, São Sebastião experiences a relatively dry close to the year, with only 28 mm (1.1 in) of precipitation spread over just 8 days. This trend follows a gradual decline in rainfall, following the peak months of May and June, which see over 100 mm and up to 24 days of rain. The holiday season in December brings a welcome relief from the heavier downpours of earlier months, making it an appealing time for visitors to enjoy the coastal beauty of this Brazilian paradise. As the rainfall tapers off, it signals the transition towards the drier summer months, allowing locals and tourists alike to bask in the sun with fewer interruptions from rain.
In Sao Sebastiao, Brazil, December marks the transition into the summer season with humidity levels reaching 76%. This figure reflects a notable decline from the preceding months, particularly after peaking at 86% from April to May. The trend showcases a gradual decrease in humidity from the mid-year highs, peaking in late autumn, which could offer residents and visitors a more comfortable experience in this coastal paradise. Transitioning into the warmer months, December's lower humidity levels signal a shift, providing a refreshing respite before the humidity begins to rise again in January.
In December, Sao Sebastiao experiences a consistently high UV Index of 14, maintaining its standing within the extreme exposure category. This level of UV radiation demands caution, as residents and visitors alike have a mere 10 minutes before risking sunburn. It's clear that the region remains a hotspot for intense sun exposure, mirroring trends observed throughout the year—particularly in the months leading up to December, where similar extreme levels dominated from January to April and were notably high in October and November. As you plan outdoor activities, it's essential to stay informed and take protective measures. For detailed UV Index awareness, visit Sao Sebastiao UV Index.
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As the year winds down, December in São Sebastião shines brightly with an impressive 354 hours of sunlight. This month continues a trend of abundant sunshine, following a remarkable peak in October with 355 hours, making it one of the brightest months of the year. The gradual progression from January's 288 hours shows a steady increase in daylight, with March leading the way at 349 hours. The sun's embrace remains strong through the latter months, with a slight dip in April and May, but ultimately, December's warm glow heralds the summer season in Brazil, inviting both locals and tourists to bask in its beauty. This consistent sunshine not only enhances the natural allure of São Sebastião but also supports a vibrant beach culture, making it a perfect escape during the festive season.
In December, the likelihood of sunny weather in São Sebastião, Brazil, stands at 27%, reflecting a dip that mirrors the arrival of the rainy season. This rate is notably lower when compared to the warmer months, peaking at 50% in March and sustaining higher probabilities throughout the summer. From August to October, the sun's presence was more promising, hinting at clearer skies that precede December's cloudier conditions. As the year winds down, this trend emphasizes the transition to a more humid environment, making December a month where sunshine becomes a delightful surprise amid the increasing rainfall.
In Sao Sebastiao, Brazil, daylight duration exhibits a rhythmic pattern throughout the year. From January to March, the days are consistently bright with 12 hours of daylight, providing a perfect backdrop for summer activities. As the year transitions into April, daylight begins to shorten, settling at 11 hours and remaining steady through August. However, with the arrival of September, the daylight gradually climbs back to 12 hours, where it holds steady through November and into December. This cyclical variation in daylight not only enhances the region’s vibrant culture but also invites locals and visitors alike to enjoy the beauty of the tropical landscape year-round.
As December rolls in, the winds in São Sebastião, Brazil, pick up slightly, averaging 3.7 m/s (8 mph)—a continuation of the trend seen since November. This month's wind speed reflects the transition from the calmer breezes of the mid-year, which dipped to about 2.3 m/s (5 mph) during the winter months. As the year draws to a close, the coastal air comes alive, offering a refreshing change that complements the warm climate. With wind speeds now consistently hovering around 7 to 8 mph, the December breezes invite both locals and visitors to enjoy the vibrant energy of the beach, making it an ideal time for watersports and outdoor gatherings.
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 the weather between December and January, both months experience similar temperatures, with a minimum of 22°C (72°F), an average of 27°C (81°F), and a maximum reaching around 36°C (97°F in December and 96°F in January). However, January tends to be slightly wetter, with a total precipitation of 35 mm (1.4 in) over 12 days, compared to December's 28 mm (1.1 in) across 8 days. Additionally, January has higher humidity levels at 81%, compared to 76% in December. For more detailed information, you can check Sao Sebastiao weather in January.
December weather typically sees temperatures ranging from a minimum of 22°C (72°F) to a maximum of 36°C (97°F), with an average of 27°C (81°F). The month experiences 28 mm (1.1 in) of precipitation spread over about 8 days, along with a humidity level of 76%. In contrast, February offers slightly warmer temperatures, with a minimum of 23°C (73°F) and an average high of 35°C (95°F), and an average temperature of 28°C (82°F). However, it is also wetter, receiving 49 mm (1.9 in) of rainfall over approximately 13 days and a higher humidity of 82%. This increase in precipitation and humidity makes February a more humid month compared to December. For more details on the February climate, check out Sao Sebastiao weather in February.
December and March showcase warm weather in Sao Sebastiao, with both months featuring a minimum temperature of 22°C (72°F) and an average of 27°C (81°F). However, March tends to be slightly hotter, reaching a maximum temperature of 37°C (99°F) compared to December's 36°C (97°F). Additionally, March experiences significantly increased rainfall, with 91 mm (3.6 in) over 17 days, compared to December's 28 mm (1.1 in) spread over just 8 days. Humidity also rises from 76% in December to 84% in March, making the latter month feel a bit muggier. For more details on the weather, you can check Sao Sebastiao weather in March.
When comparing the weather in December and April, both months exhibit similarities in average temperatures, maintaining around 27°C (81°F). December tends to be slightly warmer, with maximum temperatures reaching up to 36°C (97°F), while April's highs are a bit lower at 34°C (93°F). However, the two months differ significantly in terms of precipitation and humidity. December experiences less rainfall, with only 28 mm (1.1 in) over 8 days, whereas April sees a pronounced increase in precipitation, totaling 94 mm (3.7 in) across 20 days, making it a much wetter month. Furthermore, the humidity levels rise in April to 86%, compared to December's 76%, contributing to a noticeably more humid atmosphere. For more detailed information, you can check Sao Sebastiao weather in April.
In December, the weather features warmer temperatures, with a minimum of 22°C (72°F) and an average of 27°C (81°F), peaking at 36°C (97°F). The month experiences relatively low precipitation, totaling 28 mm (1.1 in) over about 8 days, along with moderate humidity levels at 76%. In contrast, May brings cooler temperatures, with a minimum of 20°C (69°F) and an average of 25°C (78°F), reaching a maximum of 34°C (94°F). However, May is much wetter, with precipitation reaching 105 mm (4.1 in) over 22 days and higher humidity at 86%. For more detailed information, you can check Sao Sebastiao weather in May.
In December, Sao Sebastiao experiences warmer temperatures, with a minimum of 22°C (72°F) and a maximum of 36°C (97°F), averaging around 27°C (81°F). In contrast, June sees milder conditions, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 30°C (87°F), averaging 24°C (76°F). While December has relatively low precipitation at 28 mm (1.1 in) over 8 days, June is much wetter, receiving 109 mm (4.3 in) across 24 days of rain. The humidity is slightly higher in June at 83%, compared to December's 76%. For more detailed insights into June weather in Sao Sebastiao, visit Sao Sebastiao weather in June.
December generally experiences warmer temperatures compared to July, with average highs reaching up to 36°C (97°F) and lows around 22°C (72°F). In contrast, July sees milder conditions with an average maximum of 30°C (86°F) and a minimum of 17°C (63°F). Additionally, December has significantly lower precipitation levels, with only 28 mm (1.1 in) over about 8 days, while July is much wetter, receiving 108 mm (4.2 in) over 24 days. Humidity remains relatively high in both months, peaking at 76% in December and slightly higher at 81% in July. For more details, check out Sao Sebastiao weather in July.
When comparing the weather in December and August, December typically boasts warmer temperatures, with an average of 27°C (81°F) and highs reaching up to 36°C (97°F). In contrast, August's temperatures are milder, averaging around 24°C (75°F) and peaking at a maximum of 31°C (88°F). Precipitation also differs significantly; December experiences less rain with 28 mm (1.1 in) over about 8 days, while August sees more rainfall, totaling 62 mm (2.5 in) over approximately 20 days. Additionally, humidity levels are slightly higher in August at 80%, compared to December's 76%. For more details on August weather in Sao Sebastiao, you can check Sao Sebastiao weather in August.
In comparing the weather between December and September, December tends to be warmer with an average temperature of 27°C (81°F) and maximum highs reaching 36°C (97°F), compared to September's average of 24°C (76°F) and a peak of 33°C (91°F). Additionally, December experiences significantly less precipitation, with only 28 mm (1.1 in) falling over 8 days, whereas September sees a greater amount of rainfall at 52 mm (2.1 in) over 18 days. Humidity levels are also slightly higher in September at 79%, compared to December's 76%. For more detailed insights, you can explore Sao Sebastiao weather in September.
In comparing December and October weather, December typically sees slightly warmer temperatures, with averages reaching 27°C (81°F) compared to October's 26°C (79°F). The maximum temperatures in December can soar to 36°C (97°F), a degree higher than October's maximum of 35°C (95°F). Precipitation levels are similar for both months, with December recording 28 mm (1.1 in) over 8 days and October having 26 mm (1.0 in) over 9 days. Humidity remains fairly consistent, with December at 76% and October at 77%. For more detailed information about weather conditions in October, visit Sao Sebastiao weather in October.
In comparing the weather between December and November, we see that both months exhibit similar temperature profiles, with December experiencing a minimum of 22°C (72°F), an average of 27°C (81°F), and a maximum of 36°C (97°F). November, on the other hand, has slightly cooler temperatures with a minimum of 21°C (71°F), an average also at 27°C (81°F), and a max of 35°C (96°F). Precipitation levels are consistent in both months, with 28 mm (1.1 in) recorded over 8 days, and humidity remains steady at 76%. For more specific details about November's weather, you can visit Sao Sebastiao weather in November.
As December unfolds in São Sebastião, the weather transforms into a vibrant tapestry of warmth and humidity, setting the stage for a lively summer. With average temperatures hovering around 27°C (81°F), the days invite sun-seekers to bask in warmth, although the occasional rain might dance across the landscape, bringing an extra 28 mm of precipitation over about 8 days. This month’s high humidity levels of 76% create a tropical ambiance that differentiates December from the cooler and drier months preceding it. For those eager to explore the full breadth of São Sebastião's climate, check out Sao Sebastiao Climate for comprehensive insights.