Last updated: August 21, 2025
September in Ouro Preto, Brazil is characterized by a warm climate perfect for exploration. The maximum temperature can soar to 33°C (92°F), offering ample sunshine and warmth, while the average temperature hovers around a pleasant 20°C (68°F), making it ideal for outdoor activities. However, the month can start with a cool bite, dipping as low as 9°C (48°F) during the nights. Expect around 55 mm (2.1 in) of precipitation spread over 7 days, resulting in a humidity level of 63%—a reminder of the region's lush environment. Whether you're wandering the historic streets or enjoying the local culture, September presents a delightful blend of warmth and occasional refreshing rain.
In September, Ouro Preto experiences a delightful shift in temperatures as it transitions firmly into spring. The minimum temperature rises to a comfortable 9°C (48°F), setting a pleasant backdrop for the days ahead. With an average temperature of 20°C (68°F), the weather invites outdoor exploration, while the maximum can soar to a balmy 33°C (92°F), highlighting the region's warm and inviting climate. This marks a notable increase from the cooler winter months, creating ideal conditions for enjoying the city's stunning colonial architecture and vibrant culture. As the days grow warmer, visitors can revel in the crisp mornings and warm afternoons that characterize this charming Brazilian destination.
In September, Ouro Preto experiences a noticeable uptick in precipitation, with an average of 55 mm (2.1 in) falling over the course of 7 days. This marks a transition from the drier months of July and August, which saw minimal rainfall, to the onset of the wetter season that typically begins in October. Compared to the 53 mm recorded in May, September's precipitation indicates a revitalization of the region's lush landscapes as the rainy season looms. As the rainy days begin to increase, it sets the stage for a vibrant October, historically known for significantly higher rainfall, showcasing the rhythmic climatic patterns that define this picturesque Brazilian town.
As the calendar shifts to September, Ouro Preto experiences a notable drop in humidity, averaging around 63%, the lowest point of the year. This relief from the summer's sticky embrace—characterized by a peak of 87% in March—hints at the changing seasons, where the air becomes crisper and more comfortable. Following the humid months of winter, where July and August recorded their lowest levels at 77% and 72%, respectively, September marks a transition to drier conditions that continue into October, which sees humidity plummet to just 48%. This gradual decline not only highlights the region’s seasonal rhythm but also offers a refreshing break from the heavier atmospheric moisture that defines the earlier part of the year.
In September, Ouro Preto experiences a UV Index of 12, categorized as extreme, which means even brief sun exposure can lead to skin damage in just 10 minutes. This marks a slight increase from the previous month's UV Index of 11, aligning with a general upward trend noticeable throughout the late winter into early spring months. Interestingly, from January to August, the UV Index fluctuated between extreme and very high levels, suggesting that visitors should remain vigilant about sun protection. As the seasons change, the UV levels are expected to soar again, reaching peaks in the upcoming months. For more detailed information on UV levels, visit Ouro Preto UV Index.
UV Risk Categories
As September rolls in, Ouro Preto, Brazil, basks in an impressive 311 hours of sunshine, marking it as one of the sunniest months of the year. This month stands out for its bright rays, surpassing August's 294 hours and showcasing a notable peak in sunlight as the city transitions from winter to spring. Following a trend of gradually increasing daylight from the cooler months, September offers a vibrant backdrop for the rich cultural and historical tapestry of the city. With summer just around the corner, the added sunshine not only warms the air but also invigorates the spirit of those exploring Ouro Preto’s charming streets and stunning landscapes.
In September, Ouro Preto enjoys a reasonable likelihood of sunny weather, with a 58% chance of sunshine. This pleasant trend follows the peak sunshine of July, which boasts an impressive 79%, and the warm embrace of August at 59%. As the region transitions from the dry winter months into early spring, September presents an enticing opportunity for outdoor enthusiasts to explore the charming streets and stunning landscapes. While the chances of sun decline in October, the tail end of the winter season continues to favor those hoping for bright days.
As September arrives in Ouro Preto, Brazil, the daylight duration settles at 11 hours, consistent with the previous months of June, July, and August. This marks a subtle shift from the longer days of January and February, which basked in an impressive 13 hours of light. From March to May, daylight gradually decreased before plateauing at 11 hours during the winter months. As the year progresses, October will bring a slight increase to 12 hours, welcoming longer days again as spring approaches. The rhythm of daylight in this region showcases the graceful transition between seasons, creating a unique atmospheric charm that reflects the changing times of the year.
As September arrives in Ouro Preto, Brazil, a gentle shift in the atmosphere becomes evident with the wind speed rising to an average of 2.6 m/s (6 mph). This increase marks a subtle yet notable transition from the relatively calm summer months, where winds lingered around 1.8 m/s to 2.2 m/s. Following the breeze of August, which brushed the skyline at 2.5 m/s, September breathes a refreshing vitality into the air. This trend suggests that while the winds are still soft, they are beginning to carry a promise of change, hinting at the vibrant transformations that the upcoming seasons will bring. As the leaves start to turn and the days grow shorter, the slightly stronger winds serve as a reminder of nature's cyclical rhythm in this historic landscape.
Weather in Ouro Preto varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ouro Preto, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Ouro Preto is mild, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 33°C (92°F) and an average of 20°C (68°F). The month sees relatively low precipitation at 55 mm (2.1 in) over 7 days and maintains a humidity level of 63%. In contrast, January brings warmer temperatures, with a minimum of 16°C (61°F), an average of 22°C (72°F), and a maximum of 31°C (88°F). However, it also has significantly higher rainfall, totaling 193 mm (7.6 in) over 13 days and increased humidity at 83%. For more specifics on January weather, check out Ouro Preto weather in January.
September and February exhibit distinct weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 33°C (92°F), with an average of 20°C (68°F). The month experiences moderate precipitation of 55 mm (2.1 in) over about 7 days, alongside a humidity level of 63%. In contrast, February features milder temperatures, with a minimum of 16°C (61°F) and a maximum of 32°C (90°F), averaging 22°C (71°F). However, February is much wetter, receiving 281 mm (11.1 in) of rainfall over 20 days, with increased humidity at 85%. For more details, visit Ouro Preto weather in February.
September and March present distinct weather characteristics. In September, temperatures range from a mild 9°C (48°F) at night to a warm 33°C (92°F) during the day, offering an average of 20°C (68°F). This month sees a moderate amount of precipitation, with around 55 mm (2.1 inches) over 7 days, contributing to a humidity level of about 63%. In contrast, March enjoys slightly warmer temperatures, with minimums at 13°C (56°F) and maximums reaching 31°C (87°F), averaging 22°C (71°F). However, March is much wetter, experiencing a total of 190 mm (7.5 inches) of rain spread over 16 days, leading to higher humidity at 87%. For more detailed information on March weather, visit Ouro Preto weather in March.
When comparing the weather in September and April, one can observe some notable differences. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 33°C (92°F), with an average of 20°C (68°F). The month sees less precipitation with 55 mm (2.1 in) over about 7 days, and humidity levels are a more moderate 63%. In contrast, April experiences slightly warmer temperatures with a minimum of 11°C (51°F) and a maximum of 30°C (86°F), while maintaining the same average of 20°C (68°F). However, it features increased rainfall, totaling 80 mm (3.1 in) over 13 days, and higher humidity at 86%. For a detailed overview of conditions during this time, visit Ouro Preto weather in April.
Comparing the weather in September and May reveals some interesting differences. September typically experiences warmer temperatures, with a minimum of 9°C (48°F) and a maximum reaching up to 33°C (92°F), while May starts cooler with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 28°C (82°F). This difference in temperature contributes to a more moderate average of 20°C (68°F) in September compared to 18°C (64°F) in May. Additionally, while both months receive similar amounts of precipitation at around 55 mm (2.1 in) over approximately 7 days, May tends to be more humid with a humidity level of 82% compared to September's 63%. For more details, you can refer to this link: Ouro Preto weather in May.
In comparing the weather of September and June, we can observe notable differences. September tends to be warmer, with average temperatures reaching 20°C (68°F) and highs of 33°C (92°F), while June has a cooler average of 17°C (63°F) and a maximum of 28°C (82°F). Additionally, September experiences more precipitation, with 55 mm (2.1 in) over about 7 days, compared to June's 15 mm (0.6 in) over just 4 days. Humidity is also lower in September at 63%, whereas June has a higher humidity level of 82%. For further details, you can check Ouro Preto weather in June.
In comparing the weather between September and July, September exhibits a wider temperature range with minimums of 9°C (48°F) and maximums reaching 33°C (92°F), resulting in an average of 20°C (68°F). In contrast, July has cooler temperatures, with a minimum of 5°C (41°F) and a maximum of only 28°C (82°F), leading to a lower average of 16°C (61°F). Additionally, September receives more precipitation, totaling 55 mm (2.1 in) over 7 days, while July sees significantly less, with only 7 mm (0.3 in) over just 1 day. The humidity in September is relatively moderate at 63%, whereas July has a higher humidity level at 77%. For further details, you can check Ouro Preto weather in July.
September experiences warmer weather compared to August, with average temperatures rising from 17°C (62°F) in August to 20°C (68°F) in September. The maximum temperature also sees a notable increase, reaching up to 33°C (92°F) in September, while August peaks at 28°C (83°F). Although September receives more precipitation at 55 mm (2.1 in) over 7 days compared to August's 35 mm (1.4 in) across 5 days, it has a slightly lower humidity of 63% compared to 72% in August. For more detailed information about the weather patterns in August, you can check Ouro Preto weather in August.
In September, the weather features a wide range of temperatures, with a minimum of 9°C (48°F), an average of 20°C (68°F), and a maximum of 33°C (92°F). Precipitation is relatively moderate at 55 mm (2.1 in) over 7 days, accompanied by a humidity level of 63%. In contrast, October brings slightly warmer conditions, with a minimum temperature of 12°C (54°F), an average of 21°C (69°F), and a peak of 34°C (93°F). However, October experiences significant rainfall, totaling 192 mm (7.6 in) over a much wetter month with precipitation occurring on 20 days and a lower humidity of 48%. For more detailed information, check the Ouro Preto weather in October.
September and November feature similar average temperatures, with September ranging from a minimum of 9°C (48°F) to a maximum of 33°C (92°F) and November slightly warmer, with temperatures from 10°C (51°F) to 31°C (88°F). However, November is markedly wetter, experiencing significantly higher precipitation at 256 mm (10.1 in) over 22 days compared to September’s 55 mm (2.1 in) over just 7 days. The humidity levels are fairly comparable, with September at 63% and November at 61%. For a more detailed insight into November's weather in Ouro Preto, you can check Ouro Preto weather in November.
In September, the weather is generally warmer with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 33°C (92°F), and an average of 20°C (68°F). The month experiences about 55 mm (2.1 in) of precipitation over approximately 7 days, with humidity levels at 63%. In contrast, December sees slightly milder temperatures, with a minimum of 12°C (55°F) and a maximum of 31°C (87°F), averaging 21°C (71°F). However, December is significantly wetter, receiving 277 mm (10.9 in) of rain spread over 23 days, resulting in a higher humidity level of 68%. For more detailed information, you can check Ouro Preto weather in December.
As September rolls in, Ouro Preto welcomes a refreshing shift in weather, characterized by a pleasant average temperature that invites exploration of its historic streets. Unlike the cooler, wetter months preceding it, September's climate becomes increasingly comfortable, offering a mix of warm days and cooler nights. While you might still encounter a few rainy days, the overall precipitation lessens compared to the earlier part of the year, creating a delightful atmosphere for outdoor activities. The mild humidity levels further enhance the experience, making it a perfect time to appreciate the stunning landscapes and cultural richness of this remarkable city. For more detailed insights, check out Ouro Preto Climate.