Last updated: August 21, 2025
In Araruama, Brazil, December ushers in a warm and humid climate, with maximum temperatures reaching 31°C (89°F) and an average of 25°C (77°F). While the warmth invites outdoor activities, residents and visitors should prepare for the possibility of rain, as the month sees approximately 181 mm (7.1 in) of precipitation over 17 rainy days. With humidity levels hovering around 81%, the atmosphere feels notably tropical, making it a perfect time to enjoy the region's natural beauty while staying mindful of intermittent showers.
In December, Araruama, Brazil, ushers in the summer with mild temperatures that offer a delightful escape from the chill of winter elsewhere. The month starts off with a minimum of 18°C (65°F) and peaks at a comfortable 31°C (89°F), making it an ideal time for beach activities and outdoor adventures. With an average temperature of 25°C (77°F), residents and visitors alike can enjoy warm, sunny days perfect for exploring the region's beautiful landscapes. As the year wraps up, the temperatures gradually trend toward the warmth and vibrance that define Brazil's summer, showcasing a consistent rise that suggests an enticing blend of relaxation and excitement in this coastal paradise.
In December, Araruama, Brazil, experiences a significant surge in precipitation, with 181 mm (7.1 in) of rainfall over 17 days, making it one of the wetter months of the year. This increase follows a notably rainy November, which recorded 192 mm (7.6 in)—the highest monthly total. The trend throughout these months illustrates a marked shift towards higher rainfall, especially as the year draws to a close. Not only does December continue this pattern, but it also contrasts sharply with the drier mid-year months, where totals dipped as low as 32 mm (1.3 in) in July. The consistent rainfall in December sets the stage for a lush start to the new year, highlighting the region's dynamic climate.
In December, Araruama, Brazil, experiences a humidity level of 81%, which is a slight increase from November’s 79%. Throughout the year, humidity tends to be highest in the early months, peaking at 86% in February before gradually decreasing to its lowest point of 74% in October. As the year draws to a close, December marks a subtle rise after the drier months, highlighting a transition towards the wetter summer season. This pattern illustrates how humidity in Araruama is not only significant but also cyclical, contributing to the region's lush landscapes and vibrant ecosystems.
As we wrap up the year in Araruama, Brazil, December presents a notably high UV Index of 15, categorizing it once again as extreme. This trend of intense UV exposure is consistent throughout the months, with similar levels recorded in January and February, both at a staggering 16 and 14, respectively. Interestingly, the UV Index begins to decrease during the mid-year months, dropping to 6 in June and 7 in July, but sharply rises again in September and November, making the latter part of the year particularly harsh for sun exposure. With a burn time of just 10 minutes this month, it’s crucial for residents and visitors alike to remain vigilant in protecting their skin. To learn more about UV levels year-round, check out the detailed Araruama UV Index.
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December in Araruama, Brazil, is truly a month of radiant sunshine, boasting an impressive 334 hours of sunlight. This marks a delightful peak in the yearly trend, as daylight gradually increases from the cooler months of winter. While the year starts with a robust 286 hours in January, dynamics shift as the tropical sun bathes the region in light, reaching a noteworthy 304 hours by November. The consistent rise in sunshine hours underscores the region's charm during the festive season, making December the perfect time for beach outings and outdoor festivities. Araruama, with its vibrant sunshine, invites locals and visitors alike to bask in the warmth and beauty of its breathtaking landscapes.
In Araruama, Brazil, the likelihood of sunny weather in December stands at 39%, slightly below the annual trend but indicative of a generally moderate sunshine rate for the month. As the year progresses, there is a notable increase in sunny days, peaking in July with a remarkable 65% chance, followed by June and April. While December may not offer the most promising forecast, the conditions remain relatively consistent compared to November's 35%. Thus, while visitors can expect a mix of sun and cloud in December, the month continues to embody the transition toward sunnier days typical of the Brazilian summer season.
In Araruama, Brazil, the daylight duration varies throughout the year, showcasing a fascinating rhythm. December maintains the longer daylight hours typical of late spring, with a generous 13 hours of light gracing the days. This trend of extended daylight begins in January and remains consistent through November, hinting at the vibrant and lively atmosphere of summer. As the year progresses, daylight gradually decreases from March through May, dropping to 10 hours by mid-year, before making a gradual comeback in August and continuing to increase again until the year closes out. The cycle reflects the region's soothing transition from the lively warmth of summer into the more subdued winter, yet always offers a generous share of light to enjoy.
As December rolls into Araruama, Brazil, the average wind speed settles at a gentle 3.2 m/s (7 mph), marking a notable dip from the breezier conditions of earlier months. While the winds are relatively calm, this slight decrease follows a trend observed through the latter part of the year, where November's winds were recorded at 3.5 m/s (8 mph). Interestingly, this month contrasts with the breeziness of September, which boasted winds of 4.5 m/s (10 mph). By the time the year draws to a close, the December winds offer a serene backdrop, perfect for enjoying the warm beach atmosphere, providing a comforting farewell to the year's gustier months.
Weather in Araruama varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Araruama, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is warm with minimum temperatures averaging around 18°C (65°F) and reaching up to a maximum of 31°C (89°F). The month experiences significant rainfall, with 181 mm (7.1 in) recorded over 17 days, contributing to a humidity level of 81%. In contrast, January sees slightly higher temperatures, with minimums of 21°C (69°F) and maximums climbing to 33°C (92°F). Precipitation decreases significantly to 102 mm (4.0 in) over just 11 days, and humidity rises to 85%. For more details, you can check Araruama weather in January.
In December, the weather is warm with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 31°C (89°F), and an average temperature of 25°C (77°F). This month experiences significant precipitation, with 181 mm (7.1 in) falling over 17 days and humidity levels at 81%. In comparison, February sees slightly warmer temperatures with a minimum of 21°C (69°F) and a maximum of 33°C (92°F), averaging at 26°C (79°F). Precipitation is slightly lower at 156 mm (6.1 in) over 16 days, but humidity increases to 86%. For more details, check out Araruama weather in February.
In comparing the weather between December and March, we notice some notable differences. December has a slightly lower minimum temperature of 18°C (65°F) and an average of 25°C (77°F), while March starts at a minimum of 20°C (68°F) and averages 26°C (79°F). Additionally, March tends to experience warmer maximum temperatures, peaking at 33°C (91°F) compared to December's 31°C (89°F). Precipitation levels are fairly similar, with December receiving 181 mm over 17 days and March slightly lower at 172 mm over 16 days. Humidity is also slightly higher in March at 84% versus December's 81%. For more detailed information about March weather, you can check Araruama weather in March.
In December, the weather is typically warmer with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 31°C (89°F), and it experiences higher precipitation with approximately 181 mm (7.1 in) over 17 days. The humidity is also quite high at 81%. In contrast, April sees slightly cooler average temperatures, with a range from a minimum of 18°C (65°F) to a maximum of 33°C (91°F). Precipitation is significantly lower at about 80 mm (3.1 in) over 12 days, and humidity remains comparable at 82%. For more specific details about weather patterns in April, you can refer to Araruama weather in April.
In comparing the weather between December and May, December tends to be slightly warmer, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 31°C (89°F), and an average of 25°C (77°F). This month also experiences higher precipitation, with 181 mm (7.1 in) falling over 17 days and humidity levels at 81%. In contrast, May offers a milder temperature range starting from a minimum of 16°C (61°F) to a maximum of 32°C (89°F), with an average of 23°C (73°F). Rainfall decreases significantly to 72 mm (2.9 in) over just 10 days, while humidity remains fairly consistent at 80%. For more details on the climate during this time, you can explore Araruama weather in May.
In December, the weather tends to be warmer and more humid compared to June, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 31°C (89°F) and an average of 25°C (77°F). The month also experiences significant rainfall, with 181 mm (7.1 in) of precipitation spread over 17 days, contributing to a humidity level of 81%. In contrast, June offers slightly cooler temperatures, with a minimum of 16°C (61°F) and a maximum of 31°C (88°F), but an overall average of just 22°C (72°F). Rainfall is markedly lower in June, totaling only 43 mm (1.7 in) over 9 days, and humidity dips to 78%. For a detailed look at the weather conditions during this month, check out Araruama weather in June.
In December, the weather is generally warmer and more humid compared to July, with average temperatures reaching around 25°C (77°F) and maximums peaking at 31°C (89°F). December also experiences significantly higher precipitation, accumulating 181 mm (7.1 in) over 17 days, leading to a humidity level of 81%. In contrast, July sees a cooler average temperature of 21°C (70°F), with a minimum of 14°C (58°F) and maximums capping at 31°C (88°F). The rainfall in July is markedly lower at 32 mm (1.3 in) over just 7 days, resulting in a slightly drier atmosphere with 77% humidity. For more details on the weather in July, you can visit Araruama weather in July.
In December, the weather is significantly warmer, with average temperatures ranging from a minimum of 18°C (65°F) to a maximum of 31°C (89°F) and an average of 25°C (77°F). This month also sees considerable precipitation, totaling 181 mm (7.1 in) over 17 days, contributing to a high humidity level of 81%. In contrast, August offers cooler temperatures, with a minimum of 14°C (58°F), an average of 21°C (70°F), and a maximum of 32°C (90°F). Precipitation is much lighter in August, amounting to just 68 mm (2.7 in) across 9 days, and humidity is relatively lower at 75%. For more details on August weather, you can view Araruama weather in August.
In comparison to September, December in Araruama experiences warmer temperatures, with an average reaching 25°C (77°F) compared to September's 23°C (73°F). While the maximum temperature in September can climb to 32°C (91°F), December's highs peak at a slightly lower 31°C (89°F). December also sees significantly more rainfall, with 181 mm (7.1 in) over 17 days, while September only receives 61 mm (2.4 in) across 8 days. Additionally, humidity is higher in December at 81%, compared to 75% in September. For more detailed insights on September weather, visit Araruama weather in September.
In comparing the weather patterns of December and October, December tends to be slightly warmer on average, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 31°C (89°F), compared to October's range of 17°C (62°F) to 33°C (92°F). While October experiences a bit more variability in maximum temperatures, December has a higher average with increased humidity at 81%, compared to October's 74%. Additionally, December is considerably wetter, receiving 181 mm (7.1 in) of precipitation over 17 days, while October sees 107 mm (4.2 in) of rain across 15 days. For more detailed insights, you can check Araruama weather in October.
In comparing the weather of December and November, December shows a slight increase in minimum and average temperatures, with a minimum of 18°C (65°F) and an average of 25°C (77°F), while November has a minimum of 17°C (63°F) and an average of 23°C (74°F). However, November experiences a higher maximum temperature of 33°C (91°F) compared to December’s maximum of 31°C (89°F). Both months are quite humid, with December at 81% and November slightly lower at 79%. Precipitation is also noteworthy, with December receiving 181 mm (7.1 in) over 17 days, while November has 192 mm (7.6 in) over 16 days, indicating that both months experience significant rainfall. For more details on November weather in Araruama, visit Araruama weather in November.
As December unfolds in Araruama, the weather heralds a shift towards the warmth and vibrancy of summer. With temperatures peaking at a comfortable 31°C, the month offers a noticeable contrast to the cooler, more temperate months preceding it. Rainfall, while frequent with about half the days seeing precipitation, serves to nourish the lush landscapes rather than dampen spirits. At the same time, the humidity hovers around a notable 81%, giving the air a refreshing, tropical feel. Overall, December sets the stage for long sunny days and vibrant outdoor activities, making it a delightful time to experience the unique charm of this coastal town. For more insights on seasonal variations, check out Araruama Climate.