Last updated: August 21, 2025
In Cabo Frio, Brazil, August greets visitors with a pleasantly mild climate characterized by average temperatures around 21°C (70°F), peaking at a comfortable 26°C (78°F) during the day. Nights are refreshing, with temperatures dipping to a minimum of 17°C (63°F). While the month witnesses about 50 mm (2.0 in) of rain over 9 days, the humidity hovers around 75%, providing a tropical ambiance. This combination makes August an ideal time for exploring the beautiful beaches and scenic landscapes of Cabo Frio, balancing sunny moments with brief, refreshing showers.
In Cabo Frio, Brazil, August ushers in the late winter season, characterized by a distinct drop in temperatures. With minimums averaging 17°C (63°F) and maximums peaking at 26°C (78°F), locals and visitors alike can enjoy a mild climate that is both comfortable and refreshing. The average temperature hovers around 21°C (70°F), heralding a slight cooling trend compared to the warmer months of mid-year. As summer fades, nights become crisper, and the days remain pleasant enough for outdoor activities, making it an ideal time to explore the region's stunning beaches and vibrant culture. This gradual transition into spring also hints at the approaching warmth, allowing for a perfect balance of winter's coolness and the anticipation of sunnier days ahead.
In August, Cabo Frio experiences an average precipitation of 50 mm (2.0 in), marking a slight increase from the drier months of July and June. This month typically sees about 9 days of rain, contributing to the region's lush landscape. While August's rainfall is less than the heavier deluge observed in March and November, it sets the stage for the transition into the wetter season ahead. The consistent precipitation levels in early to mid-year, followed by a noticeable uptick in the latter months, highlight Cabo Frio's seasonal rhythm, where the summer months often bring more robust rainfall, enriching the vibrant local ecosystems.
In Cabo Frio, Brazil, August marks a transition into slightly drier conditions, with humidity dropping to a comfortable 75%. This is part of a broader trend observed throughout the year, where humidity gradually declines from the peak of 86% in February to its annual low in October at 74%. After experiencing higher humidity from late spring to early summer, the cooler temperatures of August create a pleasant atmosphere, while the consistent figures of 75% in both August and September suggest a stable climate. As the year progresses, the region typically witnesses an uptick in humidity again by late fall, signaling a dynamic yet predictable weather pattern that enhances Cabo Frio's charm.
In August, Cabo Frio experiences a UV Index of 9, placing it in the very high exposure category with a burn time of just 15 minutes. This marks a slight uptick from the previous months of June and July, which had lower UV Index values of 6 and 7, respectively. Notably, the UV Index tends to escalate as the year progresses, with values peaking in the early months of the year, where extremes are common. As summer approaches, locals and visitors alike need to be mindful of the increasing UV exposure levels. To learn more about the UV Index throughout the year, visit Cabo Frio UV Index.
UV Risk Categories
August in Cabo Frio, Brazil, offers a delightful average of 291 hours of sunshine, perfectly positioned between the mild winter months and the sun-drenched days of spring. This slight dip in sunlight compared to the energetic 324 hours of March reflects a seasonal transition, yet Cabo Frio continues to bask in considerable warmth. Notably, the city tends to see a steady increase in daylight as the year progresses, with December shining the brightest at an impressive 336 hours. As the warmth of summer approaches, August remains a fantastic month for beach lovers and sun seekers, showcasing Cabo Frio’s unyielding charm amidst the shifting seasons.
August in Cabo Frio, Brazil, boasts a 60% chance of sunny weather, making it one of the more favorable months for beachgoers and outdoor enthusiasts. This vibrant coastal city sees a noticeable increase in sunshine as it transitions from the cooler mid-year months, where the chances climb from 61% in June to 64% in July, before settling at a comfortable level in August. As summer approaches, the likelihood of sunny days remains encouraging compared to the lower probabilities seen in the preceding months, suggesting that visitors can expect to enjoy pleasant weather. With a reduction in sun chance appearing as fall approaches in September, August stands out as a prime time for those seeking to soak up the sun in this picturesque location.
In Cabo Frio, Brazil, the daylight duration during August marks a subtle transition, with approximately 11 hours of sunlight. This pattern reflects a gradual return to longer days following the mid-year months, where daylight dips to around ten hours. As summer begins to approach, daylight gradually increases from the shorter days of May through July, which consistently offer about ten hours of sun. This trend hints at the rejuvenating energy of the Brazilian summer, as daylight starts to climb once again, preparing the picturesque town for vibrant sunlit days to follow in September and October.
In August, the winds in Cabo Frio, Brazil, pick up their pace, reaching an average speed of 7.6 m/s (17 mph), making it one of the breeziest months of the year. This invigorating gust coincides beautifully with the end of winter, creating ideal conditions for water sports and outdoor activities. The trend shows that while wind speeds tend to fluctuate throughout the year, August stands out as a peak, followed closely by January and September, which also enjoy notable windiness. This seasonal shift not only enhances the coastal ambiance but also attracts both locals and tourists eager to embrace the fresh, salty air and the energetic vibes that accompany the summer's approach. As Cabo Frio transitions into the warmer months, the persistent winds are a reminder of nature's rhythm, invigorating the legacy of this beautiful seaside destination.
Weather in Cabo Frio varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Cabo Frio, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in August and January, there are notable differences in temperature and humidity. August experiences a milder climate with minimum temperatures around 17°C (63°F) and average highs of 26°C (78°F), alongside a relatively humid atmosphere at 75%. In contrast, January brings warmer conditions, with minimum temperatures at 21°C (71°F) and averages peaking at 28°C (83°F), although it does have higher humidity at 85%. Additionally, precipitation is slightly more frequent in August, with rain occurring on about 9 days, while January sees rain on just 4 days with a total of 38 mm (1.5 in) compared to August’s 50 mm (2.0 in). For more details on January weather in Cabo Frio, visit Cabo Frio weather in January.
In August, the weather in Cabo Frio tends to be milder, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 26°C (78°F), and an average of 21°C (70°F). While the precipitation is relatively moderate at 50 mm (2.0 in) over about 9 days, humidity levels hover around 75%. In contrast, February brings warmer weather, with temperatures averaging 25°C (77°F) and peaking at 29°C (84°F). The month sees increased rainfall, totaling 77 mm (3.0 in) over the same number of rainy days, accompanied by higher humidity at 86%. For more detailed insights, check the full details on Cabo Frio weather in February.
When comparing the weather in August and March, notable differences emerge. August typically features milder temperatures, with averages around 21°C (70°F) and maximums reaching 26°C (78°F), alongside lower humidity levels at 75%. In contrast, March experiences warmer conditions, averaging 25°C (78°F) and peaking at 29°C (84°F), but with higher humidity at 84% and significantly increased precipitation of 126 mm (5.0 in) over 11 days. For more detailed information about the climate in March, visit Cabo Frio weather in March.
When comparing the weather in April and August, April generally presents warmer temperatures, with averages ranging from 21°C (70°F) to a maximum of 28°C (83°F), while August has milder temperatures, with averages from 17°C (63°F) to 26°C (78°F). Both months see similar amounts of precipitation, with April receiving 51 mm over 12 days, slightly more than August's 50 mm over 9 days. Additionally, humidity levels are higher in April at 82%, compared to 75% in August. For more detailed insights, you can check Cabo Frio weather in April.
In comparing the weather of August and May, we observe that both months have similar precipitation patterns, each experiencing rain on about 9 days, but May sees a higher average rainfall of 73 mm compared to August's 50 mm. Temperature-wise, August showcases a more moderate range with minimums at 17°C (63°F) and maximums at 26°C (78°F), while May boasts slightly warmer averages, with minimums of 19°C (66°F) and maximums up to 27°C (82°F). Humidity levels are also higher in May, reaching 80%, compared to 75% in August, making May feel a bit more humid despite the overall warmth. For more information, you can visit Cabo Frio weather in May.
In comparison to June, August tends to be slightly cooler, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 26°C (78°F). June experiences higher minimum and average temperatures, starting at 19°C (67°F) and peaking at 27°C (80°F). Precipitation is slightly higher in August, averaging 50 mm (2.0 in) over 9 days, compared to June's 41 mm (1.6 in) over 8 days. Both months have similar humidity levels, with August at 75% and June slightly higher at 78%. For more details, you can check Cabo Frio weather in June.
In comparing the weather of August to July, we see a few notable similarities and differences. Both months feature a minimum temperature of 17°C (63°F) and an average temperature around 21°C (70°F) to 21°C (71°F), with maximums reaching 26°C (78°F) in August and 26°C (79°F) in July. However, August experiences increased precipitation, with a total of 50 mm (2.0 in) over 9 days, compared to July's 27 mm (1.1 in) over 6 days. Humidity levels remain fairly consistent, with August at 75% and July slightly higher at 77%. For a more detailed look at the weather during July, you can refer to Cabo Frio weather in July.
In comparing the weather between August and September, we notice a slight shift in temperature and precipitation patterns. August tends to be cooler, with minimum temperatures averaging 17°C (63°F) and maximums reaching 26°C (78°F), while September sees a minor increase, starting at a minimum of 19°C (67°F) and maintaining the same maximum of 26°C (78°F). Precipitation also decreases from 50 mm (2.0 in) over 9 days in August to 41 mm (1.6 in) across just 5 days in September, indicating a drier period. Humidity remains consistent at 75% for both months, ensuring a generally comfortable atmosphere. For more detailed insights, you can check Cabo Frio weather in September.
August and October in Cabo Frio showcase similar temperature ranges, with August having a minimum of 17°C (63°F) and an average of 21°C (70°F), while October slightly rises with a minimum of 18°C (64°F) and an average of 22°C (73°F). Both months see a maximum temperature of around 26°C (78°F to 79°F), indicating warm conditions. However, October experiences more precipitation, totaling 67 mm (2.6 in) over 11 days, compared to August's 50 mm (2.0 in) over 9 days, while humidity levels remain relatively stable at around 74%-75%. For more details on October's conditions, you can check Cabo Frio weather in October.
In comparing the weather of August and November, we see some notable differences. August features a cooler temperature range with a minimum of 17°C (63°F) and an average of 21°C (70°F), while November is slightly warmer, with a minimum of 20°C (68°F) and an average of 23°C (73°F). Precipitation also increases in November, with 109 mm (4.3 in) over 13 days, compared to August's 50 mm (2.0 in) over 9 days. Additionally, humidity is slightly higher in November, reaching 79% compared to August's 75%. For more details on the climate during this time, you can check Cabo Frio weather in November.
August and December in Cabo Frio present distinct weather characteristics. In August, temperatures range from a minimum of 17°C (63°F) to a pleasant average of 21°C (70°F), peaking at a maximum of 26°C (78°F). The month experiences around 50 mm (2.0 in) of precipitation over approximately 9 days, with humidity levels averaging at 75%. In contrast, December sees slightly warmer temperatures, with a minimum of 21°C (70°F) and an average of 24°C (75°F), reaching a maximum of 27°C (80°F). However, December is also wetter, receiving about 101 mm (4.0 in) of rain over 10 days and featuring higher humidity at 81%. For more details on December weather, check out Cabo Frio weather in December.
In August, Cabo Frio experiences a delightful transition as temperatures begin to cool slightly, offering a refreshing contrast to the preceding winter months. With an average temperature hovering around a comfortable 21°C (70°F), this month is perfect for those seeking milder weather without the intense heat of summer. However, expect occasional rain, with 9 days of precipitation contributing to the lush greenery of the region. The 75% humidity adds a hint of tropical warmth, making it an inviting time to explore Cabo Frio's stunning beaches and vibrant culture. For more insights into Cabo Frio's diverse climate throughout the year, check out the complete overview at Cabo Frio Climate.