Last updated: August 21, 2025
May in Oeiras, Brazil brings a delightful atmosphere, with temperatures ranging from a refreshing 21°C (70°F) to a sizzling 37°C (98°F), leading to an enjoyable average of 29°C (84°F). Throughout the month, residents experience a modest precipitation total of 13 mm (0.5 in) over just 3 days, offering brief but welcome relief from the heat. The air carries an 87% humidity, enhancing the tropical feel that characterizes this vibrant region. Weather in Oeiras during May is perfect for outdoor enthusiasts looking to bask in the sun while being ready for the occasional refreshing shower.
In May, Oeiras, Brazil, experiences a delightful blend of warmth and comfort, making it an inviting time of year. With temperatures ranging from a minimum of 21°C (70°F) to a maximum of 37°C (98°F), the average settles at a pleasant 29°C (84°F). This month marks a subtle but noticeable shift toward warmer days, as it transitions from the cooler April, where highs peaked at 35°C (95°F). As the sun begins to shine brighter and longer, residents and visitors alike can enjoy the outdoors in ideal conditions that strike a perfect balance between heat and comfort, setting the stage for vibrant May activities.
May marks a significant shift in precipitation patterns for Oeiras, Brazil, as the region experiences a dramatic decrease in rainfall. With only 13 mm (0.5 in) recorded over just 3 days, May stands in stark contrast to the preceding months of January through April, which each saw substantially higher totals ranging from 82 mm (3.2 in) in January to 217 mm (8.5 in) in February. This trend of diminishing rainfall continues into June, where only a mere 3 mm (0.1 in) is expected. The arrival of drier months, like July and August, reinforces the seasonal transition, highlighting May as a pivotal turning point in the annual precipitation cycle that prepares the landscape for the imminent dry spell.
In Oeiras, Brazil, May marks a notable transition in humidity levels. With an average humidity of 87%, it showcases a decline from the wetter months of early year—where January, February, and March hover around 90% or higher. This shift indicates a gradual easing of the intense moisture that characterizes the start of the year, setting the stage for the upcoming dry season. Following May, humidity levels drop significantly, dipping to 77% in June and even further down to 66% by July. This trend not only highlights the seasonal change but also emphasizes a refreshing shift, making May a particularly comfortable time before the drier months take hold.
In May, the UV Index in Oeiras, Brazil, remains markedly high at 12, indicating an extreme exposure category, with a quick burn time of just 10 minutes. This trend of intense UV radiation spans several months, with indices consistently hovering around 14 to 15 from January to April. Following May, the UV Index slightly declines to 11 in June and July but still maintains that extreme classification. The year-round patterns highlight the importance of sun protection, especially between the peak months of January through April, as well as in November and December. Be sure to stay informed and prepare accordingly by checking the Oeiras UV Index for the latest updates.
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In Oeiras, Brazil, the vibrant May sunshine reaches its peak, with the month boasting an impressive 327 hours of glorious sunlight. This delightful trend reflects a gradual increase from January's modest 251 hours, building towards the summer months where sunshine flourishes. As April transitions into May, the sunny hours jump significantly, demonstrating the approaching winter excitement. Following May, the sunshine remains plentiful through June and July, maintaining over 325 hours. The sun-soaked days continue into late summer, culminating in a delightful August with 348 hours, showcasing the region's generous climate. This captivating pattern not only enriches the local landscape but also invites residents and visitors to bask in Oeiras' warmth throughout the year.
As spring gives way to summer in Oeiras, Brazil, the likelihood of sunny weather significantly increases in May, boasting a 51% chance of sunshine. This marks a noticeable shift from the earlier months of the year, where January through April showed much lower probabilities, hovering between 18% and 34%. Following May, the trend continues to escalate, with June seeing a robust 71% chance of sunny days, further rising to 77% in July and peaking at 81% in August. This progressive increase in sunshine not only heralds the arrival of warmer days but also positions May as a delightful transition month, setting the stage for the sunny bliss that characterizes Oeiras’ vibrant summer months.
In Oeiras, Brazil, the daylight duration reveals a beautiful rhythm throughout the year. From January to March, residents enjoy a generous 12 hours of sunlight daily, inviting outdoor activities and vibrant community life. As April arrives, daylight subtly decreases to 11 hours, a trend that continues through the cooler months of May to August. Interestingly, as the seasons shift towards spring, daylight duration nudges back up to 12 hours in September, paving the way for longer days in the festive months of October to December. This harmonious cycle of daylight not only enhances the natural beauty of the region but also influences the local lifestyle, showcasing the enchanting interplay of light and nature in Oeiras.
As May arrives in Oeiras, Brazil, the wind begins to pick up, bringing a refreshing change to the atmosphere with an average wind speed of 3.1 m/s (7 mph). This marks a noticeable increase from the preceding months, where wind speeds hovered around the lower averages of 1.5 to 2.1 m/s. The gradual climb in winds from April to May signals the onset of more dynamic weather patterns, setting the stage for the breezy conditions that will continue into the summer months. With June and July showcasing stronger gusts of 3.4 m/s (8 mph) and 4.1 m/s (9 mph) respectively, May serves as an essential transition, introducing a prelude to the more vigorous winds that Oeiras will experience in the coming weeks.
Weather in Oeiras varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Oeiras, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of May and January, we find that both months experience fairly warm temperatures, but with some notable differences. May typically sees a minimum temperature of 21°C (70°F) and averages around 29°C (84°F), reaching highs of 37°C (98°F). This month has relatively low precipitation, with just 13 mm (0.5 in) over 3 days, and humidity levels are moderately high at 87%.
In contrast, January tends to be slightly warmer, with minimum temperatures at 22°C (71°F) and an average of 28°C (82°F), peaking at a sweltering 39°C (103°F). However, it is also much wetter, receiving 82 mm (3.2 in) of rainfall over 14 days, and the humidity is marginally higher at 90%. For more detailed information, check out Oeiras weather in January.
May and February offer distinct weather experiences, despite sharing similar maximum temperatures of 37°C (98°F). In May, the climate tends to be warmer and drier, with averages reaching 29°C (84°F) and only 13 mm of precipitation over about 3 days, resulting in a humidity level of 87%. In contrast, February experiences a more humid environment, with an average temperature of 27°C (81°F) and significantly higher rainfall, totaling 217 mm (8.5 in) over 21 days. This increased precipitation makes February a wetter and more humid month, often leading to a more tropical feel. For more details on the February weather in Oeiras, you can visit Oeiras weather in February.
In comparing the weather of May and March, we notice a significant shift in temperature and precipitation patterns. May boasts warmer temperatures, with averages reaching 29°C (84°F) and maximums hitting 37°C (98°F), while March has slightly cooler averages of 27°C (81°F) and maximums of 35°C (94°F). However, March is characterized by much higher precipitation, recording 159 mm (6.3 in) over 22 days, compared to May's minimal 13 mm (0.5 in) across just 3 days. Humidity levels remain relatively high in both months, with March at 93% and May slightly lower at 87%. For a detailed look at March weather conditions, check Oeiras weather in March.
In comparing the weather between April and May, one can observe a notable increase in temperatures. May features a minimum of 21°C (70°F) and an average of 29°C (84°F), peaking at 37°C (98°F), whereas April has similar minimum temperatures but a lower average of 27°C (82°F) and a maximum of 35°C (95°F). Precipitation also differs significantly; April experiences far more rainfall at 86 mm (3.4 in) over 14 days, compared to May's lighter precipitation of 13 mm (0.5 in) over just 3 days. Additionally, humidity levels are slightly higher in April at 92% compared to May's 87%. For more detailed insights, you can check Oeiras weather in April.
In May, the weather typically features temperatures ranging from a minimum of 21°C (70°F) to a maximum of 37°C (98°F), with an average of 29°C (84°F). This month experiences around 13 mm (0.5 in) of precipitation over three days, and humidity levels are relatively high at 87%. Conversely, June maintains a similar temperature profile with a minimum of 20°C (69°F), an average of 29°C (84°F), and a maximum of 37°C (98°F). However, June is significantly drier, seeing only 3 mm (0.1 in) of precipitation on none of the days. Additionally, humidity drops to 77%, making June feel a bit more comfortable overall. For more details, check Oeiras weather in June.
In comparing the weather of May and July, we see that both months have similar minimum and average temperatures, with May recording a maximum of 37°C (98°F) compared to July’s slightly higher maximum of 38°C (101°F). However, a significant difference lies in the precipitation levels: May experiences 13 mm (0.5 in) of rain over 3 days, leading to a much higher humidity level of 87%. In contrast, July boasts completely dry conditions with 0 mm of precipitation over the entire month, resulting in a lower humidity of 66%. This makes July a hotter and more arid month overall. For more information about the weather specifics, you can check Oeiras weather in July.
May and August offer distinct weather patterns, with May experiencing higher humidity and more precipitation compared to August. In May, temperatures range from a minimum of 21°C (70°F) to a maximum of 37°C (98°F), with an average of 29°C (84°F) and about 13 mm of rain over three days, creating a muggy atmosphere with humidity at 87%. In contrast, August's temperatures are slightly warmer on average, ranging from a minimum of 20°C (68°F) to a maximum of 38°C (101°F), but it boasts completely dry conditions with no rainfall and significantly lower humidity at 58%. For a closer look at the weather specifics, you can check Oeiras weather in August.
May and September present contrasting weather patterns. In May, temperatures range from a minimum of 21°C (70°F) to a maximum of 37°C (98°F), with an average temperature of 29°C (84°F). This month also experiences some rainfall, with about 13 mm (0.5 in) over three days and high humidity levels at 87%. In contrast, September features warmer temperatures, with a minimum of 21°C (71°F) and reaching a maximum of 40°C (104°F), while the average temperature climbs to 31°C (89°F). Notably, September is completely dry, with no recorded precipitation, and lower humidity at 51%. For a more detailed look at September's weather, check out Oeiras weather in September.
In May, temperatures range from a minimum of 21°C (70°F) to a maximum of 37°C (98°F), with an average temperature of 29°C (84°F). This month experiences relatively high humidity at 87%, along with light precipitation of 13 mm (0.5 in) over about three days. In contrast, October sees slightly warmer temperatures, with a minimum of 23°C (74°F) and a maximum reaching 40°C (104°F), while the average temperature rises to 32°C (90°F). The humidity drops significantly to 45%, and rainfall increases to 20 mm (0.8 in) but occurs over just two days. For a more detailed look at October weather in Oeiras, check out Oeiras weather in October.
When comparing the weather in May and November, we find both months exhibiting warm temperatures but with notable differences. May features a minimum temperature of 21°C (70°F) and an average of 29°C (84°F), peaking at 37°C (98°F). The month is characterized by high humidity at 87% and limited precipitation, totaling only 13 mm (0.5 in) over 3 days. In contrast, November has slightly higher starting temperatures, with a minimum of 22°C (72°F) and an average of 30°C (86°F), but it can reach even higher, with a maximum of 39°C (103°F). However, November experiences more rainfall, accumulating 51 mm (2.0 in) over 6 days, and significantly lower humidity at 41%. For more details on the weather during this month, you can visit Oeiras weather in November.
May and December both feature warm average temperatures around 29°C (84°F), but their weather experiences are quite distinct. In May, temperatures typically range from a minimum of 21°C (70°F) to a maximum of 37°C (98°F), with relatively low precipitation of just 13 mm (0.5 in) over about 3 days, leading to a high humidity level of 87%. In contrast, December sees slightly elevated temperatures, with a minimum of 22°C (72°F) and a maximum of 39°C (102°F). However, December is far wetter, receiving 81 mm (3.2 in) of rain across about 10 days, paired with lower humidity at 67%. For more details on December weather, you can visit this link: Oeiras weather in December.
As May unfolds in Oeiras, the weather shifts to embrace warm and inviting conditions, with average temperatures hovering around 29°C (84°F). Unlike the preceding months, May introduces a slight increase in humidity at 87%, adding a touch of tropical warmth to the atmosphere. While rainfall is minimal, with only a few days of precipitation, the dry spells are perfectly complemented by the occasional delightful shower. This blend of warmth and occasional humidity makes May a pleasant month, setting the stage for a vibrant Brazilian spring. For more insights into the climate all year round, visit Oeiras Climate.