Last updated: August 21, 2025
In December, Beira Rio, Brazil, experiences a warm and vibrant climate characterized by a maximum temperature reaching an impressive 39°C (102°F), while the average temperature settles comfortably at 27°C (81°F). With a minimum of 18°C (64°F), the nights offer a pleasant respite from the day's heat. The region receives approximately 117 mm (4.6 in) of rain over 9 days, contributing to a relative humidity level of 52% that adds a tropical flair to the atmosphere. This blend of warmth and moisture creates the perfect backdrop for enjoying the lush landscapes and lively cultural activities that define this vibrant locale.
In Beira Rio, Brazil, December marks the transition into summer, characterized by warm and inviting temperatures. The month boasts a minimum temperature of around 18°C (64°F), while the average sits comfortably at 27°C (81°F), perfect for enjoying the outdoors. As the days heat up, the maximum temperature can reach 39°C (102°F), aligning with the trend of increasing warmth as the year draws to a close. This consistent warmth, coupled with relatively stable humidity levels, makes December an ideal time for travelers seeking to bask in the Brazilian sun and indulge in vibrant local festivities.
In December, Beira Rio experiences a notable increase in precipitation, with a substantial 117 mm (4.6 in) of rainfall over 9 days. This uptick follows a wet November, which recorded 131 mm (5.2 in), making the end of the year a particularly rainy season. Compared to the preceding months, where dry spells in May, June, July, and August barely registered any rain, December's rainfall signifies a welcome shift for the region, contributing to replenished water resources and a vibrant natural landscape. Thus, as the year wraps up, Beira Rio transitions into a wetter climate, showcasing the unique dynamism of its precipitation patterns.
December in Beira Rio, Brazil, ushers in a noticeable shift in humidity levels, culminating a year characterized by varying moisture in the air. While the month begins with a relatively high humidity of 52%, it represents a significant decline from the peak of 90% in March. This gradual decrease throughout the year paints a picture of a region transitioning from the dampness of the rainy season to the drier months approaching summer. As December progresses, the humidity remains lower than the sweltering figures seen mid-year, signaling a refreshing change as locals and visitors alike enjoy the easing air while preparing for the vibrant festivities of the holiday season.
In Beira Rio, Brazil, the UV Index in December stands at a striking 15, placing it firmly within the extreme exposure category. This marks a continuation of a trend observed throughout the year, with consistently high UV levels that have hovered around 15 during the peak summer months of January, February, and November. Even in the late spring and early fall, the index remains alarming, fluctuating between 13 and 14 in September and October. As we transition into the cooler months of June and July, there is a slight respite with very high indexes of 10, providing a temporary break, but still necessitating quick action with a burn time of just 15 minutes. With such persistent levels of UV radiation, residents and visitors are strongly advised to take precautions to protect their skin. For more details on the UV Index in this region, visit Beira Rio UV Index.
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In Beira Rio, Brazil, December bathes the landscape in a warm glow, offering 325 hours of sunshine, which showcases the region's delightful climate as it transitions into the festive summer season. This month marks a continuation of the upward trend in daylight that begins in the earlier months of the year. Starting from 283 hours in January, sunshine hours steadily increase, reaching a peak of 348 hours in October. Although there is a slight dip in November, December promises abundant sunlight, maintaining the momentum with hours only slightly below the year's highest. This pattern highlights a vibrant and sun-soaked summer, inviting both locals and tourists to revel in the outdoor festivities under the clear skies.
In Beira Rio, Brazil, the likelihood of sunny weather takes a significant dip in December, with only a 13% chance of clear skies. This marks a stark contrast to the sunny disposition seen in earlier months like September, where sunshine probability peaks at 81%. Following the vibrant summer months of July and August, which enjoy 72% and 73% sunshine likelihood respectively, December heralds a transition into gloomier weather, further emphasizing the noteworthy decline. As temperatures cool and the rainy season sets in, residents and visitors alike may want to keep their umbrellas handy, as the anticipation of sun gives way to the reality of cloudier days.
In Beira Rio, Brazil, December brings a delightful consistency in daylight, with 12 hours of sun each day, mirroring the preceding months of January, February, March, September, October, and November. This trend highlights a tropical climate where daylight remains abundant throughout much of the year. As the calendar inches toward the end of the year, the daylight duration does not dip significantly, maintaining a vibrant atmosphere. The brief period of reduced sunlight in April through August, when daylight drops to 11 hours, gradually leads back to the longer days of the late year, creating a rhythmic ebb and flow of brightness that residents and visitors alike can enjoy. The steady daylight encourages a lively outdoor culture, perfect for embracing the warm, sunny days of summer.
As December arrives in Beira Rio, Brazil, the winds gently calm, with an average speed of 1.5 m/s (3 mph), marking a gentle wind lull compared to the breezier months that precede it. The trend through the year reveals a gradual increase in wind speeds from the tranquil days of January to the gustier heights of July at 2.5 m/s (6 mph). However, December signifies a seasonal shift, where the winds retreat back to their softer pace, echoing the warmth of the summer to come. This rhythmic ebb and flow of wind complements the vibrant atmosphere of Beira Rio, inviting locals and visitors alike to enjoy the tranquility of the season.
Weather in Beira Rio varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Beira Rio, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January present notable differences in weather patterns. December typically experiences slightly higher maximum temperatures, reaching up to 39°C (102°F), while January's maximum cools off slightly to 37°C (100°F). However, January features a higher minimum temperature, starting at 20°C (67°F) compared to December's 18°C (64°F), and maintains a marginally warmer average temperature of 28°C (82°F) against December's 27°C (81°F). Precipitation in December is significantly higher at 117 mm (4.6 in) over about 9 days, whereas January sees a drastic reduction with only 30 mm (1.2 in) across 3 days. Additionally, January has increased humidity levels averaging 78%, contrasting with December's more comfortable 52%. For further insights into January's weather, you can explore Beira Rio weather in January.
December and February showcase notable differences in weather patterns. December experiences a broader temperature range, with minimums dipping to around 18°C (64°F) and maximums reaching up to 39°C (102°F), averaging at 27°C (81°F). In contrast, February starts off slightly warmer with minimums at 20°C (68°F) and a slightly lower maximum of 37°C (99°F), while still maintaining the same average temperature. Precipitation is higher in December, totaling 117 mm (4.6 in) over 9 days, compared to February’s 82 mm (3.2 in) across 10 days. Notably, February also sees significantly higher humidity at 85%, making the air feel more sultry compared to December’s 52%. For more specific insights, you can check out Beira Rio weather in February.
In December, temperatures in Beira Rio range from a minimum of 18°C (64°F) to a maximum of 39°C (102°F), with an average of 27°C (81°F). This month experiences relatively high precipitation, totaling 117 mm (4.6 in) over about 9 days, and a moderate humidity level of 52%. In contrast, March sees somewhat milder conditions, with temperatures peaking at 37°C (100°F) but maintaining a similar minimum and average temperature as December. March also has reduced precipitation at 71 mm (2.8 in) spread over 7 days, accompanied by a much higher humidity level of 90%. For more details, check out this link: Beira Rio weather in March.
In December, the weather tends to be quite warm, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 39°C (102°F) and an average of 27°C (81°F). The month sees higher precipitation, with about 117 mm (4.6 in) spread over 9 days, and humidity levels sit at around 52%.
In contrast, April experiences slightly higher minimum temperatures, starting at 19°C (66°F), but with a lower maximum of 36°C (97°F) and a similar average temperature of 27°C (80°F). The rainfall in April is significantly less, with only 37 mm (1.5 in) over 4 days, but the humidity is notably higher at 84%.
For more details on the weather specifics in April, check out Beira Rio weather in April.
In December, the weather is considerably warmer, with average temperatures reaching 27°C (81°F) and maximum highs soaring up to 39°C (102°F). This month also sees higher precipitation, with 117 mm (4.6 in) of rain spread over approximately 9 days, contributing to a lower humidity of 52%. In contrast, May offers a milder climate characterized by an average temperature of 26°C (79°F) and max temperatures of 37°C (99°F). The rainfall in May is minimal, with just 3 mm (0.1 in) over 1 day, but the humidity is notably higher at 73%. For more about the specific weather conditions in May, you can check Beira Rio weather in May.
December and June present stark contrasts in weather conditions. In December, temperatures soar with a minimum of 18°C (64°F) and an average of 27°C (81°F), peaking at a sweltering 39°C (102°F). This month also sees significant rainfall, averaging 117 mm (4.6 in) over about 9 days, contributing to a more moderate humidity level of 52%.
In contrast, June tends to be cooler, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 35°C (96°F), averaging around 25°C (76°F). Remarkably, it experiences almost no precipitation, receiving only 1 mm (0.0 in), and has a higher humidity level at 71%. For more detailed insights into June weather, you can explore this link: Beira Rio weather in June.
In December, the weather is characterized by significantly warmer temperatures, with a minimum of 18°C (64°F) and a maximum reaching up to 39°C (102°F), averaging 27°C (81°F). This month also experiences considerable precipitation, totaling 117 mm (4.6 in) over approximately 9 days, combined with a relatively low humidity level of 52%. In contrast, July brings a cooler climate, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 35°C (95°F), averaging 24°C (75°F). Notably, July is dry, with no recorded precipitation over the month and higher humidity levels at 66%. For a detailed look at the specifics of July weather in Beira Rio, you can visit Beira Rio weather in July.
In comparing the weather between December and August, December appears to be significantly warmer with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 39°C (102°F), while August has milder temperatures, reaching up to 36°C (97°F) at its peak. December experiences considerable rainfall, with 117 mm (4.6 in) over about 9 days, contrasting sharply with August's virtually dry conditions and only 1 mm (0.0 in) of precipitation across the month. Additionally, humidity levels are higher in August at 60% compared to December's 52%. For more specific details on August weather in the region, check out Beira Rio weather in August.
In comparing the weather between December and September, both months experience similar temperature ranges, with maximums reaching up to 39°C (102°F) in December and 39°C (103°F) in September. However, December is generally wetter, with an average precipitation of 117 mm (4.6 in) over 9 days, while September remains remarkably dry with only 1 mm (0.0 in) and no rainy days at all. Humidity levels are slightly lower in December at 52%, compared to 54% in September, adding to the contrast between the two months. For more detailed information on September weather, you can refer to Beira Rio weather in September.
In comparing the weather between December and October, both months feature relatively warm temperatures, with December having a minimum of 18°C (64°F) and an average of 27°C (81°F), while October shows a slightly higher average of 28°C (83°F) and a maximum of 40°C (104°F). December experiences significantly more rainfall, with a total of 117 mm (4.6 in) over approximately 9 days, compared to October's much drier conditions, which see only 26 mm (1.0 in) of precipitation over 3 days. Additionally, humidity levels are slightly higher in December at 52%, compared to October's 46%. For more details on October weather, you can check Beira Rio weather in October.
In December, temperatures in the region range from a minimum of 18°C (64°F) to a maximum of 39°C (102°F), with an average of 27°C (81°F). In contrast, November sees slightly warmer temperatures, with a minimum of 19°C (66°F) and a maximum of 38°C (101°F), while also maintaining the same average of 27°C (81°F). Both months experience similar precipitation levels, with December recording 117 mm (4.6 in) and November slightly higher at 131 mm (5.2 in). Each month has 9 days of precipitation, but December has higher humidity at 52% compared to November's 42%. For a more detailed look into November's weather, visit Beira Rio weather in November.
December in Beira Rio marks a transition, as temperatures peak with hot days that can reach up to 39°C, contrasting with the cooler months preceding it. The average temperature hovers around a comfortable 27°C, while the nights bring a mild relief at 18°C. This month also sees an increase in rainfall, with about 117 mm of precipitation over 9 days, making it noticeably wetter than prior months. Additionally, the humidity level settles at 52%, creating a warm, tropical atmosphere. For a deeper insight into the seasonal shifts, visit Beira Rio Climate.