Last updated: August 21, 2025
Experience the vibrant August weather in Rio de Janeiro, where the city basks in a warm embrace with temperature highs reaching 33°C (91°F) and comfortable averages around 21°C (70°F). As the sun shines on this beautiful coastal metropolis, expect occasional rain, with 11 days of precipitation totaling 75 mm (3.0 in), contributing to the lush surroundings. Coupled with 73% humidity, August in Rio offers a unique blend of sunshine and tropical breezes, making it an ideal time to explore the city's stunning landscapes and lively culture. Whether lounging on the beach or hiking the famous Sugarloaf Mountain, August invites you to bask in its warmth and beauty.
In August, Rio de Janeiro experiences a delightful transition in temperatures as it steps away from the cooler winter months. With minimums dipping to 14°C (57°F) and average highs reaching 33°C (91°F), the city begins to embrace the warmth of spring. The overall climate remains mild, hovering around an average of 21°C (70°F), making it an appealing time to explore the vibrant streets and stunning beaches. Compared to July, which is the coolest month, August sees a slight uptick in warmth, hinting at the approaching summer months. This blend of pleasant temperatures and sunny skies invites both locals and tourists to revel in the beauty of Rio's striking landscapes and lively culture.
In August, Rio de Janeiro experiences a moderate level of precipitation, with 75 mm (3.0 in) of rainfall spread over approximately 11 days. This marks a slight increase from the drier July, where only 38 mm (1.5 in) fell in just 7 days. As winter transitions to spring, the rainfall begins to rise again, reflecting a pattern where precipitation levels generally increase during the latter part of the year. This trend continues into September, although at a lower volume of 55 mm (2.2 in), hinting at the gradual shift towards the wetter months ahead in November and December. The August climate, therefore, serves as a bridge, hinting at the forthcoming lushness that characterizes the city’s vibrant spring environment.
In August, Rio de Janeiro experiences a noticeable decline in humidity, averaging around 73%, making it one of the more comfortable months of the year. This marks a significant drop from the bulky moisture typical of the earlier months, with January and February peaking at 85%. As summer transitions to early fall, the overall trend reveals a steady decrease in humidity, reaching its lowest point in October at 61%. With the humidity gradually easing, August presents a refreshing reprieve for both locals and visitors, setting the stage for a more enjoyable urban experience amid the bustling city life.
In August, Rio de Janeiro experiences a UV Index of 9, categorizing it as very high with a burn time of 15 minutes. This marks a slight decrease from the peak UV levels seen in the earlier months, where the index reached as high as 15 in January. However, the summer sun is still potent, reminding residents and visitors to stay vigilant about sun protection. As the year progresses, UV levels tend to fluctuate, with September seeing a jump back to extreme levels at 11. For a deeper understanding of the UV Index throughout the year, explore more on Rio de Janeiro UV Index.
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As summer transitions into autumn, August in Rio de Janeiro still basks in the warm glow of ample sunshine, boasting 275 hours of sunlight. This month, while slightly lower than the vibrant 309 hours seen in March, reflects a consistent pattern of radiant days that define the Brazilian climate. Following the sunny peaks of mid-year, August retains a delightful brightness, standing out in contrast to both the cooler winter months and the brightness of the late year. Particularly notable is that the abundance of sunshine continues through September with 293 hours, suggesting that the promise of sunny days lingers into spring. Rio's glorious light remains a defining characteristic of its charm, inviting both locals and travelers to embrace the beauty of the city throughout the year.
August in Rio de Janeiro marks a notable increase in sunny weather, with a 60% chance of sunshine making it one of the sunniest months of the year. This uptick follows a steady rise from 33% in January to 59% in July, reflecting a positive trend toward more enjoyable outdoor conditions. With the summer heat still lingering, visitors can expect vibrant beach days and lively outdoor festivities. As the city transitions into September, the likelihood of sunny skies declines to 49%, emphasizing August's unique charm and appeal for sun-seekers.
In August, Rio de Janeiro enjoys an uplifting return to longer days, with approximately 11 hours of daylight—the first hint that the vibrant summer months are on the horizon. Following the mid-year trio of months with only 10 hours of sunlight, this subtle increase in daylight signifies a gradual shift toward longer days that will culminate in the sun-drenched expanses of December, which boasts 13 hours of illumination. As the year progresses, the shifting daylight not only marks the changing seasons but also invites residents and visitors alike to embrace the city's outdoor charm in the late winter warmth. With September maintaining this 11-hour baseline, the transition from winter to spring is a celebrated phase for the sun-soaked rhythms of Rio.
In August, Rio de Janeiro experiences a noticeable uptick in wind speed, averaging 3.5 m/s (8 mph), making it one of the breeziest months of the year. This shift marks a transition into a windier period that generally continues into the spring, with September and October seeing even higher averages of 3.7 m/s (8 mph) and 3.9 m/s (9 mph), respectively. While the summer months typically boast lighter breezes, marked by January's low of 2.9 m/s (6 mph) and February’s 2.1 m/s (5 mph), August stands out as a prelude to more invigorating winds. The steady increase in wind speed from April onward reflects the dynamic nature of Rio's coastal climate, inviting both locals and visitors to enjoy its vibrant outdoor life amid refreshing gusts.
Weather in Rio de Janeiro varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Rio de Janeiro, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, the weather in Rio de Janeiro is generally milder, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 33°C (91°F) and an average of 21°C (70°F). This month sees approximately 75 mm (3.0 in) of precipitation over 11 days, accompanied by a humidity level of 73%. In contrast, January experiences warmer conditions, with temperatures starting at a minimum of 21°C (69°F) and peaking at 35°C (95°F), averaging around 27°C (81°F). Rainfall is more significant during January, totaling 112 mm (4.4 in) over 13 days, and the humidity spikes to 85%. For a more detailed overview of January's climate, you can visit Rio de Janeiro weather in January.
When comparing the weather in August and February, it’s clear that February tends to be warmer and more humid. In February, temperatures range from a minimum of 21°C (71°F) to a maximum of 35°C (95°F), with an average of 27°C (80°F), while August temperatures vary from 14°C (57°F) to 33°C (91°F), averaging at 21°C (70°F). Additionally, February sees higher precipitation levels, with 146 mm (5.7 in) over 17 days, compared to August's 75 mm (3.0 in) over 11 days. The humidity also increases in February, reaching 85%, compared to 73% in August. For more detailed insights, you can check Rio de Janeiro weather in February.
When comparing the weather in August and March, distinct differences emerge. In August, temperatures range from a minimum of 14°C (57°F) to a maximum of 33°C (91°F), with an average of 21°C (70°F). The month sees about 75 mm (3.0 in) of precipitation spread over 11 days and maintains a humidity level of 73%. In contrast, March experiences warmer temperatures, with a minimum of 20°C (68°F) and a peak of 35°C (94°F), averaging 26°C (80°F). Significant rainfall is more prevalent in March, totaling 163 mm (6.4 in) over 17 days, accompanied by higher humidity at 86%. For a deeper look into March weather specifics, check out Rio de Janeiro weather in March.
When comparing the weather in August and April, it's evident that April tends to be warmer overall. The average temperature in April reaches 25°C (76°F), with maximums hitting up to 34°C (94°F), while August has a lower average temperature of 21°C (70°F) and a maximum of 33°C (91°F). However, April experiences slightly more precipitation, with 95 mm (3.7 in) over 13 days, compared to August's 75 mm (3.0 in) over 11 days. Additionally, humidity levels are higher in April at 83%, making it feel more tropical, whereas August has a humidity of 73%. For more detailed information, check out Rio de Janeiro weather in April.
When comparing the weather in August and May, both months showcase similar temperature ranges with maximums reaching up to 33°C (91°F). However, May tends to be slightly warmer overall, with an average temperature of 23°C (73°F) compared to August's 21°C (70°F). While August experiences a minimum temperature of 14°C (57°F), May is only a degree higher at 15°C (60°F). Precipitation levels are fairly close, with May receiving 77 mm (3.1 in) over 10 days and August getting 75 mm (3.0 in) across 11 days. Notably, May also has a higher humidity level at 81%, compared to August's 73%. For more detailed weather insights, you can check Rio de Janeiro weather in May.
When comparing the weather in August and June, August tends to be slightly warmer with average temperatures ranging from 21°C (70°F) to a maximum of 33°C (91°F), while June has a cooler average of 22°C (72°F) and peaks at 32°C (89°F). Precipitation is higher in August, with 75 mm (3.0 in) spread over 11 days, compared to June’s 44 mm (1.7 in) over 9 days. Additionally, the humidity in June is marginally higher at 80%, whereas August experiences a humidity level of 73%. Overall, both months have warm temperatures, but August includes more rainfall and slightly lower humidity. For a detailed overview of June’s weather, you can check Rio de Janeiro weather in June.
In comparing the weather of August and July, both months exhibit similar average temperatures, with August showing a slight increase in the maximum temperature at 33°C (91°F) compared to July's maximum of 32°C (91°F). However, August is marked by increased precipitation, receiving 75 mm (3.0 in) over 11 days, which is significantly higher than July's 38 mm (1.5 in) spread across 7 days. Humidity remains fairly constant, with August at 73% and July slightly higher at 76%. For more detailed information, you can explore Rio de Janeiro weather in July.
August and September in Rio de Janeiro present a subtle shift in weather patterns. August tends to be cooler, with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 33°C (91°F) and an average around 21°C (70°F). It is also slightly more humid, averaging 73% humidity, and experiences about 75 mm (3.0 in) of precipitation over 11 days. In contrast, September sees warmer temperatures, with minimums of 16°C (60°F) and maximums reaching up to 35°C (96°F), accompanied by an average of 23°C (74°F). The month is drier, with only 55 mm (2.2 in) of rain spread across 8 days, and a decrease in humidity to 68%. For more detailed information, you can check Rio de Janeiro weather in September.
In August, the weather in Rio de Janeiro typically features a minimum temperature of 14°C (57°F) and an average of 21°C (70°F), with highs reaching up to 33°C (91°F). This month experiences about 75 mm (3.0 in) of precipitation spread over 11 days, along with a higher humidity level of 73%. In contrast, October sees a slight rise in temperatures, with a minimum of 17°C (63°F) and an average of 24°C (75°F), peaking at a maximum of 37°C (99°F). However, October also brings more rain, with a total of 98 mm (3.8 in) over 15 days, yet the humidity drops to 61%. For more detailed information on the weather in October, you can visit Rio de Janeiro weather in October.
In comparing the weather of August and November, it's evident that November experiences slightly warmer temperatures, with averages reaching up to 24°C (75°F) compared to August's 21°C (70°F). Additionally, November has a higher maximum temperature of 35°C (94°F) and a minimum of 17°C (64°F), while August's temperatures range from 14°C (57°F) to 33°C (91°F). Precipitation levels also rise in November, totaling 135 mm (5.3 in) over 17 days, compared to August's 75 mm (3.0 in) across 11 days. Both months exhibit high humidity, with November at 72% and August at 73%. For more details, you can check Rio de Janeiro weather in November.
August and December in Rio de Janeiro present distinct weather patterns that cater to different preferences. In August, temperatures range from a minimum of 14°C (57°F) to a maximum of 33°C (91°F), with an average of 21°C (70°F). The month receives about 75 mm (3.0 in) of precipitation over 11 days, and humidity is relatively moderate at 73%. In contrast, December offers warmer temperatures, with minimums of 18°C (65°F) and maximums reaching up to 34°C (93°F), averaging 25°C (78°F). However, it also sees increased precipitation, totaling 143 mm (5.6 in) across 17 days, while humidity remains slightly higher at 75%. This makes December a wetter and warmer month than August. For more information, check out Rio de Janeiro weather in December.
August in Rio de Janeiro marks a transition period as winter gives way to the warmer months. Visitors can expect mild temperatures where the average settles around a comfortable 21°C (70°F), making it pleasant for outdoor activities. Unlike the wetter months that follow, August sees reduced rainfall with only 75 mm over about 11 days, allowing for plenty of sun-soaked experiences. The humidity level remains moderate at 73%, creating a refreshing atmosphere ideal for exploring the city's vibrant culture and stunning landscapes. For those planning a visit, this can be a wonderful time to experience the unique charm of the city. For more detailed insights into the weather, check out Rio de Janeiro Climate.