Last updated: August 21, 2025
Experience the vibrant May weather in Rio das Ostras, Brazil, where temperatures reach a maximum of 34°C (93°F) and maintain an inviting average of 22°C (73°F). With a refreshing minimum of 13°C (56°F), this coastal paradise balances warmth with cooler evenings. This month sees 68 mm (2.7 in) of precipitation over 9 days, ensuring lush landscapes, while humidity levels hover around 80%, adding to the tropical allure. Whether you're soaking up the sun or enjoying the occasional rain shower, Rio das Ostras offers a delightful climate perfect for outdoor adventures and relaxation.
In May, Rio das Ostras begins to transition into cooler temperatures, marking a shift from the sultry summer months. The minimum temperature dips to 13°C (56°F), providing a refreshing break, while the average temperature settles at a pleasant 22°C (73°F). By day, it can still reach a comfortable 34°C (93°F), making May a delightful month for outdoor activities. As the region gradually cools, the weather remains inviting, with moderate warmth ideal for beach visits and exploring the scenic landscapes. This month encapsulates the beauty of transitioning seasons, where the lush Brazilian coastal environment thrives under softer sunlight.
In May, Rio das Ostras experiences a gentle tapering of rainfall, with an average precipitation of just 68 mm (2.7 inches) spread over 9 days. This marks a noticeable decrease from the wetter months preceding it, as April brings 73 mm and March features some of the year's highest totals at 185 mm. As the city transitions into the drier season, the drop in rainfall is accompanied by a reduction in precipitation days, suggesting a shift toward sunnier skies. This gradual decline sets the stage for June, where rainfall dwindles further to 34 mm (1.3 inches), providing a welcome respite after the spring showers. Overall, May serves as a bridge between the heavier rains of prior months and the drier conditions that characterize the coming winter, offering a refreshing balance of lush greenery and emerging sunshine.
As the warm days of May arrive in Rio das Ostras, the humidity gently settles at 80%, reflecting a noticeable decline from the previous months. This shift marks a continued decrease from the peak humidities of January and February, which hover around 85% and 86% respectively. The trend suggests a gradual transition towards the drier months of winter, with humidity steadily decreasing through to July, where it reaches the lowest point at 77%. This gradual decrease not only contributes to the pleasant climate of late autumn but also provides a respite from the intense tropical moisture characteristic of the early year. As Rio das Ostras moves deeper into the year, residents and visitors alike can look forward to enjoying a more comfortable humidity level while soaking in the stunning coastal beauty.
As the seasons shift in Rio das Ostras, Brazil, May marks a notable decrease in ultraviolet intensity compared to the blistering summer months. With a UV Index of 8, categorized as very high, the potential for skin damage is still significant, albeit reduced from earlier months where extremes prevailed. The recommended burn time extends to 15 minutes, providing a brief window for sun lovers to enjoy the outdoors while still requiring protection. This trend of high UV levels continues into the early winter months, highlighting the importance of sun safety year-round. For detailed insights and safety tips, check out the comprehensive Rio das Ostras UV Index.
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In May, Rio das Ostras experiences a delightful embrace of sunshine, boasting 289 hours of radiant light—a slight dip from the vibrant 322 hours in March, yet still substantial. This charming coastal town showcases an overall consistency in daylight hours through the months, with only minor fluctuations. After the slightly cooler April, which enjoyed 302 hours of sunshine, May continues to provide ample daylight, elegantly easing into the winter months. As we glance towards the year ahead, one can see that summer peaks in December with an impressive 331 hours, reflecting a seasonal rhythm that invites both relaxation and exploration under the sun.
In May, Rio das Ostras enjoys a favorable 47% chance of sunny weather, continuing the upward trend from the previous months. Following a peak in April at 55%, the likelihood remains relatively high before transitioning into the sunnier months of June and July, which boast probabilities of 57% and 66%, respectively. This consistency suggests that while May sees a slight dip from the spring's peak, the promise of sunshine still prevails, making it a delightful time to enjoy the region's beautiful beaches and vibrant outdoor activities. The gradual increase in sunny days leading into winter hints at the region's unique climatic charms, a captivating mix that draws visitors throughout the year.
In Rio das Ostras, Brazil, the rhythm of daylight reveals a fascinating progression throughout the year. Beginning in January, the sun graces the city with a generous 13 hours of daylight, gradually tapering off to 12 hours in February and March. As April arrives, daylight takes a slight dip to 11 hours, a trend that continues into May. This period marks a transition into the cooler months, where daylight persists at 10 hours through June and July. However, as August rolls in, the days begin to stretch again, returning to 11 hours and maintaining this duration through September. The cycle shifts once more in October, reigniting the daylight to 12 hours, paving the way for a return to 13 hours in both November and December. This pattern not only highlights the seasonal shifts in Rio das Ostras but also underscores the city's vibrant interplay with nature’s daylight dance.
In May, Rio das Ostras experiences a gentle decline in wind speed, averaging around 2.1 m/s (5 mph). This marks one of the calmer months of the year, contrasting with the breezier conditions found in the surrounding months. Following a gradual increase from April's 2.9 m/s, May sets a tranquil tone as the Brazilian autumn unfolds. Interestingly, this month serves as a bridge between the lighter winds of early in the year and the slightly brisker breezes that begin to return in June. As such, May can be seen as a time for relaxation, offering the perfect backdrop for beachgoers and nature lovers to savor the serene coastal atmosphere before the winds pick up once again.
Weather in Rio das Ostras varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Rio das Ostras, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparison to January, May in Rio das Ostras offers a slightly cooler climate, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), compared to January's warmer temperatures of 20°C (68°F) to 36°C (97°F). May experiences less precipitation, with 68 mm (2.7 in) over about 9 days, versus January's 127 mm (5.0 in) spread across 12 days. Despite the slightly lower temperatures and rainfall in May, humidity remains relatively high in both months, at 80% in May and 85% in January. For more detailed information, you can check Rio das Ostras weather in January.
In comparing the weather of May and February, we see notable differences in both temperature and precipitation. May tends to be milder, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), while February consistently offers warmer conditions, with temperatures ranging from 20°C (68°F) to 36°C (97°F). Additionally, February experiences significantly higher rainfall, with 190 mm (7.5 in) over approximately 20 days, compared to May's 68 mm (2.7 in) over just 9 days. Humidity levels are also slightly higher in February at 86%, compared to May’s 80%. For a detailed look at the climate during this month, you can refer to Rio das Ostras weather in February.
When comparing the weather in May and March, some notable differences emerge. May experiences a milder temperature range with a minimum of 13°C (56°F) and an average of 22°C (73°F), while March offers warmer conditions, with minimums around 19°C (66°F) and an average of 26°C (79°F). Additionally, March tends to be much wetter, receiving 185 mm (7.3 in) of precipitation over 17 days, compared to May's 68 mm (2.7 in) over just 9 rainy days. Humidity levels are quite similar, measuring 80% in May and 84% in March. For a more detailed look at March's climate, visit Rio das Ostras weather in March.
In comparing April and May weather, April tends to be slightly warmer with average temperatures reaching 24°C (76°F) and maximums peaking at 35°C (96°F), whereas May's temperatures range from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), with an average of 22°C (73°F). Despite April's warmer conditions, it also sees higher humidity levels at 82% and more precipitation, totaling 73 mm (2.9 in) across 12 days. May offers slightly cooler weather with 68 mm (2.7 in) of precipitation over 9 days and a humidity level of 80%. For more details on the April weather in this region, you can visit Rio das Ostras weather in April.
In comparing the weather of May and June, we can observe some notable similarities and subtle differences. Both months feature a minimum temperature of 13°C (56°F) and an average temperature of around 22°C (73°F). However, May sees slightly higher maximum temperatures, reaching up to 34°C (93°F), compared to June’s peak of 33°C (91°F). Additionally, May experiences more precipitation, with 68 mm (2.7 in) falling over 9 days, while June has only 34 mm (1.3 in) across 7 days. Humidity levels are also slightly lower in June at 78%, compared to May's 80%. For more details, you can check the Rio das Ostras weather in June.
In comparing the weather between May and July, May tends to be slightly warmer overall, with average temperatures reaching 22°C (73°F) compared to July's average of 21°C (70°F). The maximum temperatures are also a bit higher in May, peaking at 34°C (93°F) versus July's maximum of 33°C (91°F). Additionally, May experiences more precipitation, with 68 mm (2.7 in) over 9 days, while July sees much less, with only 19 mm (0.7 in) across 5 days. Humidity levels are relatively similar, standing at 80% in May and slightly lower at 77% in July. For a detailed look at what to expect during July, check out Rio das Ostras weather in July.
May and August display similar temperature ranges but differ in average temperatures and precipitation levels. In May, average temperatures peak at 22°C (73°F) with a maximum of 34°C (93°F) and are accompanied by higher humidity at 80%. The month also sees more rainfall, with 68 mm (2.7 in) over 9 days. In contrast, August experiences a slight dip in average temperature to 21°C (70°F), while still reaching up to 34°C (93°F) at its warmest. It also has less rainfall, totaling 53 mm (2.1 in) over 10 days and slightly lower humidity at 75%. For more details about August weather, you can check Rio das Ostras weather in August.
In comparing the weather of May and September, both months offer warm temperatures, though September tends to be slightly warmer on average. In May, temperatures range from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), while in September, these values shift to 15°C (59°F) and 35°C (96°F), respectively. Precipitation levels are quite similar, with May receiving 68 mm (2.7 in) over about 9 days and September seeing slightly less at 66 mm (2.6 in) across 8 days. Additionally, the humidity is a bit higher in May at 80%, compared to 75% in September, making September feel a touch more comfortable. For more detailed information, you can check Rio das Ostras weather in September.
May and October exhibit distinct weather patterns, characterized by differing temperatures and precipitation levels. In May, temperatures range from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), with an average of 22°C (73°F). The month sees about 68 mm (2.7 in) of rainfall over 9 days, accompanied by relatively high humidity at 80%. In contrast, October presents a warmer climate with minimum temperatures of 16°C (61°F) and maximums reaching 36°C (98°F), averaging 24°C (75°F). However, it also experiences higher precipitation of 117 mm (4.6 in) across 15 days, despite a lower humidity level of 74%. For those considering a visit, more details can be found at Rio das Ostras weather in October.
In May, the weather is generally warm with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 34°C (93°F), and an average temperature of 22°C (73°F). The month sees about 68 mm (2.7 in) of rainfall over approximately 9 days, coupled with high humidity levels at 80%. In contrast, November experiences slightly higher temperatures with a minimum of 15°C (60°F) and a maximum reaching up to 36°C (98°F), averaging at 24°C (75°F). However, it is considerably wetter, with precipitation totaling 235 mm (9.3 in) over 18 days, and humidity remains relatively stable at 79%. For more detailed weather insights, you can check Rio das Ostras weather in November.
May and December in Rio das Ostras present contrasting weather patterns, despite both months experiencing similar maximum temperatures of 34°C (93°F). In May, temperatures range from a minimum of 13°C (56°F) to an average of 22°C (73°F), accompanied by moderate humidity at 80% and 68 mm (2.7 in) of precipitation over approximately 9 days. Conversely, December sees higher minimum temperatures starting at 16°C (61°F) and an average of 25°C (78°F), along with significantly increased rainfall totaling 233 mm (9.2 in) across 20 days and slightly elevated humidity at 81%. For more detailed information, visit Rio das Ostras weather in December.
As May arrives in Rio das Ostras, the weather begins to transition, offering a delightful mix of warmth and mildness. With temperatures averaging around 22°C, days can peak at a balmy 34°C, making it a comfortable time to explore. Unlike the heavier rains of the summer months, May experiences only moderate precipitation, averaging about 68 mm across 9 days, allowing plenty of opportunities for outdoor activities amidst lush, vibrant surroundings. The humidity remains elevated at 80%, but the pleasant breezes help to ease the tropical feels, distinguishing this month from the sweltering heat and frequent downpours typical in January and February. For a more detailed insight into the climate throughout the year, check out Rio das Ostras Climate.