Last updated: August 21, 2025
September in Porto Belo, Brazil presents a mild and humid climate, with average temperatures hovering around 19°C (67°F). Visitors can expect a maximum of 27°C (81°F), creating pleasant conditions for outdoor activities, while the minimum dips to a crisp 12°C (53°F) at night. With approximately 85 mm (3.3 in) of rainfall spread over 12 days, it’s advisable to carry an umbrella during this month. The humidity levels linger around 82%, adding to the tropical ambiance of this beautiful coastal region. Porto Belo in September offers a delightful mix of warm days and refreshing rain, perfect for exploring its stunning landscapes.
September in Porto Belo, Brazil, marks a gentle transition into warmer conditions, featuring a minimum temperature of 12°C (53°F) and an average of 19°C (67°F). This month experiences a noticeable lift in warmth compared to the cooler depths of winter, with maximum temperatures reaching 27°C (81°F). As days grow longer and the sun starts to reassert its presence, September sets a pleasant tone for the arrival of spring. This gradual warming trend signals the perfect opportunity to enjoy outdoor activities and explore the stunning coastal beauty of Porto Belo, making it an appealing time to visit.
In September, Porto Belo experiences a modest precipitation total of 85 mm (3.3 in) over approximately 12 days of rainfall. This amount marks a slight uptick from the drier months of July and August, indicating a gradual transition towards the wetter season. The increase in both precipitation and wet days reflects a trend that begins to unfold in late winter, paving the way for the more significant rains typical of spring. As autumn approaches, residents can expect this pattern to continue, ultimately leading to the heavier precipitation peaks later in the year. The rhythm of rainfall in September not only enriches the lush landscapes but also sets the stage for the vibrant ecosystem that thrives in this beautiful region of Brazil.
As September arrives in Porto Belo, Brazil, the humidity reaches 82%, marking a slight increase from the drier months of July and August, which saw 80% and 79% respectively. This transition hints at the onset of the wetter season, as humidity levels begin to align more closely with the higher averages found in the earlier months of the year. The consistent humidity levels throughout the year, mostly fluctuating between 79% and 88%, indicate that Porto Belo residents experience a relatively humid climate, especially as they prepare for the approaching rainy season in the coming months.
September in Porto Belo, Brazil marks a transition as the UV Index hovers at 10, categorized as very high. This increase from the moderate levels observed in the cooler winter months (June and July) signifies a heightened need for sun protection as the sun becomes more intense. With a burn time of only 15 minutes, it’s crucial for both locals and visitors to remain vigilant about sun exposure. This trend hints at the approaching summer months, where UV levels will climb further, underscoring the importance of staying informed about the Porto Belo UV Index to ensure safe outdoor experiences.
UV Risk Categories
As the warmth of September settles over Porto Belo, Brazil, the sun graces the region with approximately 248 hours of radiant light, marking a slight dip from the peak summer months. While the sun-soaked days of February and March dazzled with over 300 hours, the decrease in daylight hours during September hints at the impending arrival of fall. Interestingly, although September offers less sunshine than its summer predecessors, it still stands resilient while outshining the winter months, such as June with only 228 hours. This transitional month captures the essence of autumn’s gentle embrace, inviting residents and visitors alike to enjoy the beautiful landscapes bathed in soft, golden hues.
In September, Porto Belo, Brazil, experiences a modest likelihood of sunny weather, with only a 26% chance of sunshine. This marks a notable decline compared to the peak summer months, particularly July, which boasts a 57% chance of sun. Following the vibrant warmth of winter, September transitions to spring, but the sun's presence remains elusive as cloudy days take center stage. As the month progresses, residents and visitors alike can look forward to the promise of brighter days ahead, especially with October dipping further to 17%. This trend highlights September as a transitional period, where lingering winter clouds start to ease but sunny skies are still not fully in bloom.
As September unfolds in Porto Belo, Brazil, the daylight duration holds steady at 11 hours, mirroring the trend established in August. This month marks a transition period, as days are gradually lengthening after the shorter winter months of June and July, which also each saw 10 hours of daylight. Following September, daylight durations begin to increase again, reaching 12 hours in October and continuing to grow until December, where the summer sun shines for an impressive 13 hours. This rhythmic ebb and flow of daylight reflects the region's tropical climate, inviting residents and visitors alike to enjoy the vibrant beauty of early spring in the southern hemisphere.
As September arrives in Porto Belo, Brazil, the average wind speed settles at a refreshing 3.3 m/s (7 mph), presenting a gentle breeze that complements the transition into spring. This month experiences a slight uptick compared to the calmer days of July and August, where winds dipped to their lowest, averaging 2.7 m/s (6 mph). Interestingly, September's winds set the stage for a gradual increase leading into October, which boasts an average speed of 3.9 m/s (9 mph). Notably, this trend reflects the dynamic shifts in the seasonal rhythm of Porto Belo, where the winds whisper promises of warmer days ahead, enhancing the allure of coastal exploration.
Weather in Porto Belo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Porto Belo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather features milder temperatures with a minimum of 12°C (53°F) and an average of 19°C (67°F), peaking at 27°C (81°F). However, it experiences a fair amount of precipitation, with 85 mm (3.3 in) falling over approximately 12 days and humidity levels around 82%. In contrast, January brings much warmer conditions, with minimum temperatures of 19°C (67°F) and averages rising to 25°C (78°F), reaching a maximum of 35°C (96°F). Precipitation also increases significantly in January to 172 mm (6.8 in) over 18 days, coupled with a slightly higher humidity at 86%. This difference highlights a transition from the cooler, wetter September to the hot and humid January climate. For more detailed weather information, please refer to Porto Belo weather in January.
September and February present contrasting weather patterns in Porto Belo. In September, the temperatures range from a minimum of 12°C (53°F) to a maximum of 27°C (81°F), with an average of 19°C (67°F). The month sees about 85 mm (3.3 in) of precipitation over 12 days, and humidity is relatively high at 82%. In contrast, February is warmer, with temperatures ranging from a minimum of 17°C (63°F) to a scorching maximum of 35°C (95°F) and an average of 25°C (77°F). However, it also experiences more rainfall, totaling 144 mm (5.7 in) over 16 days, with humidity slightly higher at 83%. For more detailed insights, check out Porto Belo weather in February.
When comparing the weather in September and March, several differences stand out. September experiences milder temperatures, with minimums around 12°C (53°F) and maximums peaking at 27°C (81°F), while March boasts warmer conditions, with minimum temperatures starting at 19°C (66°F) and reaching maximums of 32°C (91°F). In terms of precipitation, September sees 85 mm (3.3 in) over 12 days, whereas March is wetter, with 134 mm (5.3 in) falling over 21 days. The humidity levels also remain relatively high in both months, with September at 82% and March slightly higher at 85%. For a more detailed look at Porto Belo's weather, you can visit Porto Belo weather in March.
When comparing the weather in September and April, April tends to be warmer with average temperatures reaching 22°C (72°F), contrasted with September's average of 19°C (67°F). While both months experience moderate precipitation, September sees a slightly higher total of 85 mm (3.3 in) over 12 days, compared to April's 80 mm (3.1 in) spread over 14 days. Additionally, humidity levels are similar, with September at 82% and April slightly higher at 85%. For more details, you can check Porto Belo weather in April.
In comparing the weather between September and May, both months display mild temperatures, but May typically boasts slightly warmer conditions. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 27°C (81°F), with an average of 19°C (67°F) and a humidity of 82%. Conversely, May experiences similar minimum temperatures at 10°C (50°F) but can reach up to 30°C (86°F) as an average of 20°C (68°F) is recorded, along with a higher humidity level of 86%. Precipitation is also more pronounced in May, accumulating 103 mm (4.1 in) over 13 days compared to September's 85 mm (3.3 in) over 12 days. For a closer look at the weather patterns, check out Porto Belo weather in May.
When comparing the weather in September and June, both months exhibit relatively mild temperatures, though September tends to be slightly warmer on average. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 27°C (81°F), while June experiences a cooler temperature range with a minimum of 8°C (46°F) and a maximum of 28°C (83°F). Precipitation is higher in June, totaling 116 mm (4.6 in) over 11 days compared to September's 85 mm (3.3 in) over 12 days. Humidity levels are similar, with September at 82% and June at 85%, contributing to the overall comfort of both months. For more detailed weather information, you can check Porto Belo weather in June.
When comparing the weather between September and July, there are notable differences in temperature and precipitation. September tends to be warmer, with average temperatures reaching 19°C (67°F) compared to July's average of 17°C (62°F). Although both months share a maximum temperature of 27°C (81°F), September has a higher minimum temperature of 12°C (53°F), while July's minimum drops to 6°C (43°F). In terms of precipitation, September experiences more rainfall, recording 85 mm (3.3 in) over 12 days, whereas July sees only 45 mm (1.8 in) across 6 days. The humidity levels are quite similar, with September at 82% and July slightly lower at 80%. Overall, September presents a milder and wetter climate compared to the cooler and drier conditions of July. For more details on July weather, visit Porto Belo weather in July.
September brings a slight increase in temperature compared to August, with minimums of 12°C (53°F) versus August's 8°C (46°F) and average temperatures rising from 17°C (63°F) to 19°C (67°F). Both months share a maximum temperature of 27°C (81°F), but September experiences more precipitation at 85 mm (3.3 in) over 12 days, compared to August's 63 mm (2.5 in) over 9 days. Humidity is also slightly higher in September at 82%, compared to August's 79%. For a closer look at August weather specifics, visit Porto Belo weather in August.
In September, temperatures in Porto Belo typically range from a minimum of 12°C (53°F) to a maximum of 27°C (81°F), with an average temperature of 19°C (67°F). The month sees around 85 mm (3.3 in) of rainfall over approximately 12 days, while humidity remains relatively high at 82%. In contrast, October brings slightly warmer weather, with minimum temperatures of 13°C (57°F) and maximums reaching 31°C (89°F). The average temperature rises to 21°C (70°F), but October also experiences increased precipitation, totaling 127 mm (5.0 in) over about 16 days, maintaining the same humidity level of 82%. For more details on the October climate, you can visit Porto Belo weather in October.
In September, the weather features mild temperatures with a minimum of 12°C (53°F) and an average of 19°C (67°F), reaching a maximum of 27°C (81°F). The month experiences around 85 mm (3.3 in) of precipitation over approximately 12 days, accompanied by a humidity level of 82%. In contrast, November sees slightly warmer conditions, with minimum temperatures at 14°C (57°F) and an average of 22°C (72°F), peaking at 31°C (88°F). Precipitation increases to 98 mm (3.9 in) across about 15 days, and humidity rises to 86%. Overall, November is warmer and slightly wetter than September, making it a distinct transition into the summer season. For more detailed insights, you can check out Porto Belo weather in November.
September and December exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 27°C (81°F), with an average of 19°C (67°F). This month sees about 85 mm (3.3 in) of precipitation over 12 days, and the humidity hovers around 82%. In contrast, December experiences warmer temperatures, ranging from a minimum of 16°C (61°F) to a maximum of 33°C (92°F) and averaging 24°C (75°F). The precipitation increases to 144 mm (5.7 in) over 17 days, coupled with a slightly higher humidity of 88%. For a more detailed look at the weather in December, you can visit Porto Belo weather in December.
As September unfolds in Porto Belo, the weather begins to shift, welcoming a milder climate that sets it apart from the intense winter chill of the prior months. With average temperatures climbing to a comfortable 19°C, this month strikes a balance between the lingering coolness and the impending warmth of spring. While rain is a frequent visitor, making an appearance on about half the days, the overall humidity persists at a notable 82%, creating a fresh yet slightly damp atmosphere. If you're curious to learn more about year-round weather patterns, be sure to explore Porto Belo Climate.