Last updated: August 21, 2025
In January, Rio Negro, Brazil experiences a warm and humid climate, characterized by maximum temperatures soaring to 34°C (93°F), while average temperatures hover around a comfortable 22°C (72°F). The month is marked by a significant level of rainfall, with 150 mm (5.9 in) of precipitation spread over 18 days, contributing to an overall humidity of 86%. Visitors can expect a lush and vibrant environment, perfect for exploring the region's natural beauty, although the frequent rain showers might occasionally call for a light jacket or umbrella.
In January, Rio Negro, Brazil, experiences a warm tropical climate with temperatures ranging from a comfortable 13°C (57°F) at night to a sizzling 34°C (93°F) during the day, resulting in an inviting average of 22°C (72°F). This month is characterized by its vibrant energy and enticing warmth, marking the peak of the summer season. As the year progresses into February, the temperatures remain strikingly consistent, maintaining highs around 34°C (94°F), while nightly lows dip slightly to 11°C (51°F). A gradual cooling trend begins in April, where temperatures decline, hitting a low of 4°C (39°F) and bringing milder averages—this sets the stage for the overall temperature to plummet further as the year moves into the cooler months. By July, Rio Negro faces its coldest spell, with nighttime lows reaching -4°C (26°F). However, as the calendar shifts back to warmer months, the temperatures gradually rise again, culminating in the returning warmth of December with temperatures mirroring those in January. This cyclical pattern highlights the region's stark seasonal contrasts, offering a unique climate experience that ranges from tropical heat to refreshing coolness throughout the year.
In January, Rio Negro experiences its wettest month, with an impressive 150 mm (5.9 in) of precipitation spread over 18 days. This surge in rainfall marks the peak of the rainy season, setting the tone for the following months. As February arrives, the precipitation slightly decreases to 124 mm (4.9 in) but remains significant, with 15 rainy days. March sees further reduction, dropping to 109 mm (4.3 in) over the same number of days, indicating a gradual tapering off of the intense rainfall. By April, the showers significantly dwindle to just 47 mm (1.9 in), accompanied by only 5 rainy days. This downward trend continues into the cooler months, with July experiencing the driest conditions, collecting a mere 27 mm (1.0 in) across only 4 days. Interestingly, rainfall begins to pick up again from August, suggesting a seasonal shift as the year progresses. Overall, January stands out as the pivotal month for precipitation, illustrating Rio Negro's transition from a verdant, rain-soaked beginning to a more moderate climate in the later months.
In January, Rio Negro, Brazil, experiences a high humidity level of 86%, setting the tone for a humid summer season. This trend of elevated humidity continues into February at 83%, before stabilizing around 85% in both March and April. As the year progresses into the cooler months, humidity slightly dips, peaking again in May and remaining consistent at 86%. However, by July, the levels drop to an enjoyable 80%, marking the lowest humidity of the year. Interestingly, while late winter and early spring bring a slight reprieve, November and December surge back to 86% and 88% respectively, illustrating a cyclical pattern of high humidity throughout the year. Overall, January serves as the beginning of this humid trend, giving insight into Rio Negro's subtropical climate.
In January, Rio Negro, Brazil, experiences a scorching UV Index of 15, categorized as extreme, with an alarming burn time of just 10 minutes. This intensity remains consistent through February, highlighting a peak in solar radiation during the early months of the year. As the calendar turns to March and April, the UV Index slightly decreases to 13 and 11, respectively, but still remains in the extreme category, requiring vigilance for sun exposure. The UV levels begin to taper off in May with a reduction to 8, entering the very high range, and offering a longer burn time of 15 minutes. However, the sun's intensity makes a resurgence in September and October, where it spikes back to 11 and 13, reminding residents of the persistent risk. Notably, the year closes out with December matching January's extreme levels. To stay safe while enjoying the sun, it’s essential to keep an eye on the UV Index throughout the year. For more details on UV exposure in this region, visit Rio Negro UV Index.
UV Risk Categories
In January, Rio Negro basks in approximately 215 hours of vibrant sunshine, setting the stage for the year ahead. As the summer sun reaches its zenith, daylight hours increase dramatically, peaking at 291 hours in December. This sunny trend continues through February and March, where sunlit days soar to 266 and 273 hours respectively. A slight dip occurs in April, but the sunshine remains plentiful. Interestingly, the months following display a fascinating ebb and flow; while July showcases a noteworthy 261 hours, the sun finds a firmer grip again in November with 267 hours, highlighting a robust resurgence. Overall, the sunshine patterns in Rio Negro reveal a dynamic interplay, promising plenty of bright days and warm moments throughout the year.
In Rio Negro, Brazil, January presents a rather gloomy prospect for sun seekers, with only a 12% chance of sunny weather. This number starkly contrasts with the sunnier months that follow; particularly in February, when the likelihood of sun jumps to a more promising 43%. The trend shifts again as we move into the year, with March and April showing moderate chances of sunshine at 29% and 37%, respectively. As the months progress, the likelihood of sun steadily improves, peaking in July at a delightful 53%. While the sun may play hard to get in January, it makes a notable comeback as summer approaches, offering improved chances for those eager to bask in Brazilian sunshine.
In Rio Negro, Brazil, the month of January shines with an impressive 13 hours of daylight, setting a vibrant tone for the year ahead. Following this peak, February and March maintain a steady 12 hours, providing ample sunlight for outdoor activities and exploration. As the months progress into April and through the cooler depths of May, daylight gradually diminishes to 10 hours, reflecting the seasonal shift. Interesting trends emerge in August and September, where daylight begins to creep back up to 11 hours, hinting at the approaching warmer months. By October, the daylight nudges back to 12 hours, and once again, both November and December gift the region with 13 hours, ensuring that the end of the year is bright and full of life. This cyclical pattern of daylight not only marks the changing seasons but also enriches the vibrant culture and lifestyle of Rio Negro.
In January, the winds in Rio Negro, Brazil present a brisk yet refreshing average speed of 3.1 m/s (7 mph), setting a lively tone for the month. This gusty start stands out when compared to the subsequent months. As February arrives, wind speeds dip slightly to 2.6 m/s (6 mph), continuing a gentle decline through March and May, where speeds hover around 2.4 to 2.5 m/s (5-6 mph). Interestingly, the winds begin to pick up again in the middle of the year; June sees a modest increase to 2.7 m/s (6 mph), leading to a return to the more invigorating speeds of 3.0 m/s (7 mph) by August and October. Overall, January stands out for its vivacious start, demonstrating the dynamic nature of Rio Negro's wind patterns throughout the year.
Weather in Rio Negro varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rio Negro, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February in Rio Negro exhibit a relatively warm and humid climate, though there are some notable differences. January typically experiences slightly higher temperatures, with an average of 22°C (72°F) and a comfortable maximum of 34°C (93°F), while February has a similar average of 21°C (71°F) and a peak temperature reaching 34°C (94°F). Precipitation trends show January is wetter, with 150 mm (5.9 in) over 18 days compared to February’s 124 mm (4.9 in) over 15 days. Humidity remains fairly high in both months, although January's 86% surpasses February's 83%. For more detailed insights, you can check Rio Negro weather in February.
In January, the weather is characterized by warmer temperatures, with a minimum of 13°C (57°F) and an average high of 34°C (93°F). This month also experiences significant rainfall, with 150 mm (5.9 in) spread over 18 days and high humidity at 86%. In contrast, March sees slightly cooler temperatures, ranging from a minimum of 12°C (53°F) to a maximum of 32°C (89°F), with an average of 21°C (70°F). Precipitation is also lower in March, totaling 109 mm (4.3 in) over 15 days and with humidity remaining fairly consistent at 85%. For more specific details, visit Rio Negro weather in March.
In January, the weather is characterized by much warmer temperatures, with a minimum of 13°C (57°F) and an average of 22°C (72°F), reaching highs of 34°C (93°F). This month also experiences considerable rainfall, with 150 mm (5.9 in) spread over 18 days and high humidity at 86%. In contrast, April brings cooler conditions, featuring a minimum temperature of 4°C (39°F) and an average of 18°C (65°F), with maximums reaching 30°C (86°F). Significantly, April has much less precipitation, totaling 47 mm (1.9 in) over just 5 days, and humidity remains similar at 85%. For more detailed information on April's weather, you can visit Rio Negro weather in April.
In January, the weather is significantly warmer and more humid compared to May, with temperatures ranging from a minimum of 13°C (57°F) to a maximum of 34°C (93°F). This month experiences higher precipitation, averaging 150 mm (5.9 in) over 18 days, creating a lush and vibrant landscape. In contrast, May brings cooler temperatures, with a minimum of 2°C (35°F) and a maximum of 28°C (83°F), alongside lower precipitation of 87 mm (3.4 in) over just 8 days. Despite both months having a humidity level of 86%, the overall feel of the weather in January is much warmer and wetter than in May. For more detailed insights on May weather, you can check Rio Negro weather in May.
January and June display contrasting weather patterns. In January, temperatures peak at a warm 34°C (93°F) with an average of 22°C (72°F) and a relatively high humidity of 86%. This month also experiences significant rainfall, with around 150 mm (5.9 in) distributed over 18 days. In stark contrast, June brings cooler conditions, with maximum temperatures reaching only 26°C (79°F) and an average of 15°C (59°F). Rainfall decreases to 118 mm (4.6 in) over just 10 days, while humidity remains slightly lower at 85%. For more detailed information, you can check Rio Negro weather in June.
In January, the weather is notably warmer, with temperatures ranging from a minimum of 13°C (57°F) to a maximum of 34°C (93°F) and an average of 22°C (72°F). This month also experiences significant rainfall, with around 150 mm (5.9 in) falling over 18 days and humidity reaching a high of 86%. In contrast, July presents a much cooler climate, with temperatures dropping to a minimum of -4°C (26°F) and reaching a maximum of 26°C (79°F), averaging only 14°C (57°F). The precipitation is considerably lower, totaling just 27 mm (1.0 in) over 4 days, and the humidity is slightly reduced at 80%. For a closer look at July's weather patterns, you can check Rio Negro weather in July.
In January, the weather is typically warm, with temperatures ranging from a minimum of 13°C (57°F) to a maximum of 34°C (93°F), and an average of 22°C (72°F). Despite the warmth, this month experiences significant rainfall, totaling 150 mm (5.9 in) over approximately 18 days, contributing to a high humidity level of 86%. In contrast, August presents a much cooler atmosphere, with temperatures dropping to a minimum of -1°C (30°F) and maxing out at 30°C (87°F), averaging around 15°C (59°F). Precipitation decreases substantially in August, with only 79 mm (3.1 in) occurring over about 7 days, and humidity levels are slightly lower at 79%. For more details on August weather, you can visit Rio Negro weather in August.
In January, the weather is notably warmer, with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 34°C (93°F), accompanied by high humidity at 86%. The month also experiences substantial rainfall, with 150 mm (5.9 in) over 18 days. In contrast, September experiences cooler temperatures, with a minimum of 5°C (42°F), an average of 18°C (65°F), and a maximum of 32°C (90°F). Additionally, precipitation drops significantly to 69 mm (2.7 in) over just 8 days, and humidity is slightly lower at 82%. For more detailed insights into the weather during this month, you can visit Rio Negro weather in September.
In January, the weather is marked by warmer temperatures, with a minimum of 13°C (57°F) and an average of 22°C (72°F), while reaching a maximum of 34°C (93°F). It also sees higher humidity levels at 86% and more precipitation, totaling 150 mm (5.9 in) over 18 days. In contrast, October experiences cooler temperatures, with a minimum of 6°C (44°F) and an average of 18°C (65°F), but still can reach the same maximum of 34°C (93°F). Precipitation in October is slightly lower at 147 mm (5.8 in) over 14 days, and humidity decreases to 82%. For more information, you can check Rio Negro weather in October.
January and November showcase a noticeable shift in weather conditions. While January offers warmer temperatures, with lows around 13°C (57°F) and highs reaching up to 34°C (93°F), November tends to be milder, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 31°C (89°F). Precipitation is more significant in January, totaling 150 mm (5.9 in) over 18 days, compared to November’s 103 mm (4.1 in) over 13 days. Interestingly, both months maintain a consistent humidity level at 86%, making the air feel quite humid during this period. For more details, visit Rio Negro weather in November.
In January, the weather is slightly warmer than in December, with average temperatures ranging from a minimum of 13°C (57°F) to a maximum of 34°C (93°F), compared to December's range of 11°C (52°F) to 34°C (93°F). While both months experience similar high temperatures, January sees an average of 22°C (72°F) compared to December's average of 21°C (70°F). Precipitation levels are also a bit higher in January, with 150 mm (5.9 in) over 18 days, compared to December's 137 mm (5.4 in) over 17 days. Humidity is slightly lower in January at 86%, compared to December's 88%. For more details, you can check Rio Negro weather in December.
January in Rio Negro brings a vibrant mix of warmth and humidity, standing out from the other months with its peak temperatures and significant rainfall. As the warmest month of the year, daytimes offer a sweltering embrace, often hitting highs of 34°C, while the average warmth creates a pleasant atmosphere for both locals and visitors. However, it's also a time when the region experiences frequent rains, with almost two-thirds of the month seeing precipitation, contributing to the lush greenery that characterizes the landscape. The high humidity levels add to the tropical feel, making it essential to stay hydrated and enjoy the numerous outdoor activities that January has to offer. For a deeper understanding of what the weather has in store, check out Rio Negro Climate.