Last updated: August 21, 2025
In Oeiras, Brazil, January brings a mix of scorching temperatures and occasional rains. With maximum highs soaring to 39°C (103°F) and an average of 28°C (82°F), residents and visitors can expect a warm and humid climate, as the humidity levels reach a notable 90%. However, the month also sees significant precipitation, accumulating around 82 mm (3.2 in) over approximately 14 days, offering brief respites from the heat. Whether you're basking in the sun or dodging rain showers, January in Oeiras promises a vibrant and dynamic weather experience.
In Oeiras, Brazil, January experiences a warm tropical climate where temperatures regularly soar to a maximum of 39°C (103°F), with an average temperature of 28°C (82°F). The month starts off comfortably with a minimum temperature of 22°C (71°F), providing a pleasant start to the year. As January unfolds, it sets the tone for the hotter days ahead, showcasing a pattern of high temperatures that continue through the following months. Notably, the contrast of occasional cooler nights with minimal drops keeps the overall experience enjoyable, although February follows closely with slightly reduced maximums. This trend of predominantly warm weather and mild nights characterizes Oeiras' summer season, making it an inviting destination for sun-seekers.
In Oeiras, Brazil, January sets the stage for the rainy season, boasting an average precipitation of 82 mm (3.2 in) over 14 days of rainfall. This marks a noticeable increase in moisture compared to the drier months that follow, with February peaking at 217 mm (8.5 in) spread across 21 days of rain, signaling the height of the wet season. As the year progresses, precipitation declines sharply, plummeting to just 13 mm (0.5 in) in May and drying up entirely from July to September. The trend indicates a clear seasonal rhythm, with wet conditions dominating the earlier months, while the latter half of the year experiences a stark reduction in rainfall, encapsulating the region's unique climatic pattern.
In January, Oeiras, Brazil, experiences a significant level of humidity at 90%, setting the stage for a tropical environment. As the year progresses, humidity slightly increases to 91% in February and peaks at 93% in March, reflecting the rainy season’s grip on the region. Following this peak, the humidity begins to stabilize, with a gradual decrease as the months roll into April and May, where levels drop to 92% and 87%, respectively. The trend continues downward into the cooler months, plummeting to a comfortable 66% by July and reaching its annual low of 45% in October. This steady decline is indicative of the region's transition into a drier season, ultimately rising again to 67% in December. Overall, the humidity pattern in Oeiras reflects a distinct ebb and flow that enhances its lush, vibrant landscape while ensuring that the air remains refreshingly thick in the sweltering heat of summer.
In Oeiras, Brazil, the UV Index in January reaches an intense 14, classifying it as extreme and signaling a burn time of just 10 minutes. This trend of extreme UV exposure continues through February and April, maintaining the same index of 14. By March, the index peaks at 15, highlighting an elevated risk during the summer months. As the year progresses into May and June, the index dips slightly to 12 and 11 respectively, but remains in the extreme category, still urging caution. The intensity begins to gradually lessen as fall approaches, with values stabilizing around 12-13 from August through October. Nevertheless, November and December see a surge back to 14, keeping vigilance essential year-round. For detailed insights, be sure to check the Oeiras UV Index.
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In Oeiras, Brazil, January ushers in a promising start to the year with an impressive 251 hours of sunshine, setting the tone for the months ahead. As the calendar turns to February, the sun shines even brighter, tallying 265 hours. The trend of increasing daylight continues, peaking in the late spring and summer months, with March bringing 303 hours and August reaching a dazzling 348 hours. The sunshine remains abundant through October, reaching its highest point at 354 hours. This pattern of gradually increasing sunlight not only highlights the warmth of Brazilian summers but also sets a vibrant stage for outdoor activities and the enjoyment of the great outdoors, making Oeiras a sun-filled paradise for both residents and visitors alike. As the year winds down, the sunshine remains consistent, ensuring that even in November and December, the charm of golden rays continues to light up this beautiful coastal town.
In Oeiras, Brazil, January heralds the start of the year with a 23% chance of sunny weather, setting the tone for the wet season ahead. As the months progress, the likelihood of sunshine steadily increases, peaking in the heart of winter with a remarkable 81% chance in August. This upward trend signifies that while January and February may be less predictable, the sun's warm embrace becomes more reliable as the year unfolds, reaching a high of 77% in July. Consequently, if you're dreaming of sunny days, planning your visit for the mid-year months might offer the best odds for basking in Oeiras’ radiant climate.
In Oeiras, Brazil, January heralds the peak of daylight with a robust 12 hours of sunlight, a trend that continues through February and March, allowing residents to bask in the warmth of summer. As the season transitions into April, daylight gradually diminishes to 11 hours, a pattern that persists into the winter months of June, July, and August. Interestingly, this reduction is consistent, suggesting a stable seasonal rhythm. However, as spring approaches in September, daylight begins to lengthen again, returning to 12 hours by October and maintaining that brightness through November and December. This cyclical play between light and shadow paints a vibrant portrait of Oeiras' yearly climate, balancing long, sunlit days with the charm of shorter winter evenings.
In January, Oeiras, Brazil, experiences a gentle breeze with an average wind speed of 1.8 m/s (4 mph), setting a tranquil tone for the month. As the year unfolds, the wind gradually picks up momentum; by April, it reaches 2.1 m/s (5 mph), hinting at the dynamic shifts ahead. The winds truly roar to life from May onward, peaking in August at 4.6 m/s (10 mph), suggesting a vibrant summer energy. After this zenith, September sees a slight drop to 3.5 m/s (8 mph), followed by a gradual decline as the year winds down. By December, the winds calm once again to 1.8 m/s (4 mph), echoing the serenity of January. This pattern reflects a clear seasonal progression: a gentle start, a robust peak, and a soft retreat, showcasing the captivating rhythm of Oeiras's climate.
Weather in Oeiras varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Oeiras, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather in Oeiras is typically warm, with temperatures ranging from a minimum of 22°C (71°F) to a maximum of 39°C (103°F), averaging around 28°C (82°F). The month sees about 82 mm (3.2 in) of precipitation over 14 days, accompanied by a high humidity level of 90%.
Conversely, February presents a slightly cooler average temperature at 27°C (81°F) with a maximum of 37°C (98°F) and the same minimum of 22°C (72°F). However, this month experiences significantly more rainfall, totaling 217 mm (8.5 in) across 21 days, and humidity increases slightly to 91%. For more details on February weather, you can check Oeiras weather in February.
In January, the weather tends to be hot and humid, with temperatures averaging around 28°C (82°F) and peaking at a high of 39°C (103°F). The month also experiences considerable rainfall, totaling 82 mm (3.2 in) over 14 days, with humidity levels at 90%. In contrast, March sees slightly cooler temperatures, with an average of 27°C (81°F) and a maximum of 35°C (94°F), but it is wetter, recording 159 mm (6.3 in) of precipitation over 22 days. Additionally, humidity rises to 93%, making the overall environment feel more oppressive. For a more detailed look at March weather patterns, you can check out Oeiras weather in March.
In January, the weather is generally hot with temperatures ranging from a minimum of 22°C (71°F) to a maximum of 39°C (103°F) and an average of 28°C (82°F). This month experiences substantial rainfall, with about 82 mm (3.2 in) over 14 days and a humidity level of 90%. In comparison, April sees slightly cooler temperatures, with a minimum of 21°C (71°F), an average of 27°C (82°F), and a maximum of 35°C (95°F). Interestingly, precipitation rises to 86 mm (3.4 in), also spread over 14 days, but humidity increases slightly to 92%. For more details on regional climate, check out Oeiras weather in April.
In January, the weather is characterized by higher temperatures, with a minimum of 22°C (71°F), an average of 28°C (82°F), and a maximum reaching 39°C (103°F). This month also experiences significant precipitation, totaling 82 mm (3.2 in) over approximately 14 days, alongside high humidity levels at 90%.
In contrast, May sees slightly milder conditions, featuring a minimum temperature of 21°C (70°F), an average of 29°C (84°F), and a maximum of 37°C (98°F). The precipitation drops considerably to just 13 mm (0.5 in) over about 3 days, and humidity is also lower at 87%. For further details, check out Oeiras weather in May.
January and June in Oeiras present distinct weather patterns characterized by differences in temperature, precipitation, and humidity. In January, temperatures range from a minimum of 22°C (71°F) to a scorching maximum of 39°C (103°F), with an average of 28°C (82°F). This month is also marked by significant precipitation, totaling 82 mm (3.2 in) over 14 days, leading to a high humidity level of 90%. In contrast, June offers a slightly cooler temperature range, with a minimum of 20°C (69°F) and a maximum of 37°C (98°F), while the average temperature climbs to 29°C (84°F). Notably, June is much drier, receiving only 3 mm (0.1 in) of precipitation over 0 days, resulting in lower humidity at 77%. For more information, check out Oeiras weather in June.
In January, the weather is characterized by warm temperatures, with minimums around 22°C (71°F) and maximums reaching up to 39°C (103°F), accompanied by high humidity levels of 90%. This month also sees significant precipitation, averaging about 82 mm (3.2 in) over 14 days. In contrast, July experiences slightly cooler temperatures, with minimums at 21°C (70°F), maximums around 38°C (101°F), and an average of 29°C (84°F). Remarkably, July is dry, with no precipitation recorded across the entire month and a lower humidity level of 66%. For more detailed information, visit Oeiras weather in July.
In January, the weather is characterized by high temperatures and significant humidity, with a minimum of 22°C (71°F) and an average of 28°C (82°F), peaking at 39°C (103°F). This month also experiences considerable rainfall, totaling 82 mm (3.2 in) spread over 14 days, resulting in a humid environment with levels reaching up to 90%. In contrast, August presents a more relaxed climate, with a slightly lower minimum temperature of 20°C (68°F) and an average of 30°C (86°F), but it remains warm, maxing out at 38°C (101°F). Notably, August boasts dry conditions, with no recorded precipitation, leading to a drop in humidity to 58%. For more details, check Oeiras weather in August.
In January, the weather is characterized by warm temperatures, with minimums around 22°C (71°F) and averages reaching 28°C (82°F), peaking at 39°C (103°F). This month also sees significant precipitation of 82 mm (3.2 in) across 14 rainy days, resulting in high humidity levels at 90%. In contrast, September experiences a slightly lower minimum temperature of 21°C (71°F) and a higher average of 31°C (89°F), with maximums reaching up to 40°C (104°F). Remarkably, September is dry, with no recorded precipitation and only 51% humidity. For more detailed information, you can check Oeiras weather in September.
January and October showcase distinct weather patterns, highlighting the transition between the wet and dry seasons. In January, temperatures range from a minimum of 22°C (71°F) to a maximum of 39°C (103°F), with an average of 28°C (82°F). This month also experiences higher humidity at 90% and significant rainfall of 82 mm (3.2 in) over approximately 14 days, making it quite a humid experience. In contrast, October brings slightly warmer temperatures, with a minimum of 23°C (74°F), an average of 32°C (90°F), and a peak of 40°C (104°F). The humidity drops dramatically to 45%, and precipitation is minimal, totaling just 20 mm (0.8 in) over 2 days, offering a much drier environment. For more details on October weather in Oeiras, you can visit Oeiras weather in October.
In January, the weather in Oeiras tends to be quite humid and rainy, with temperatures ranging from a minimum of 22°C (71°F) to a maximum of 39°C (103°F). The average temperature is around 28°C (82°F), and the month sees around 82 mm (3.2 in) of precipitation over approximately 14 days. In contrast, November offers a more pleasant climate with less humidity, featuring a similar temperature range of 22°C (72°F) to 39°C (103°F) and an average temperature of 30°C (86°F). Additionally, November experiences significantly less rainfall, with only 51 mm (2.0 in) over about 6 days. For more details on this month's conditions, check out Oeiras weather in November.
In comparing the weather of January and December, we see that both months experience high temperatures, with January having an average of 28°C (82°F) and December slightly warmer at 29°C (84°F). Both months reach maximum temperatures around 39°C (102-103°F), making them quite hot, but January tends to be more humid at 90%, compared to December's lower humidity of 67%. Precipitation levels are similar, with January recording 82 mm (3.2 in) over 14 days, while December has 81 mm (3.2 in) across just 10 days. For a detailed look at weather specifics, you can refer to Oeiras weather in December.
In January, Oeiras experiences a unique blend of high temperatures and significant humidity, creating a distinctive tropical atmosphere that sets it apart from other months. With maximum temperatures soaring up to 39°C and an average of 28°C, January is undeniably one of the hottest periods of the year. Coupled with 90% humidity and 82 mm of precipitation spread over about two weeks, it presents a lively and moist climate, often leading to brief but intense rain showers. This combination of heat and humidity offers a vibrant yet challenging environment, making it essential for residents and visitors alike to stay hydrated and prepared. For a deeper understanding of the local weather patterns, explore Oeiras Climate.