Last updated: August 21, 2025
September in Palmas, Brazil, showcases a warm climate with maximum temperatures reaching 31°C (88°F) and an average of 18°C (64°F), creating an inviting atmosphere as the season transitions. Although temperatures can drop to a minimum of 5°C (41°F), the average humidity remains high at 75%, contributing to a lush, vibrant environment. Rainfall is common, averaging 98 mm (3.9 in) spread across 9 days, which adds a refreshing touch to the month. Whether you’re enjoying the warmth or admiring the greenery nourished by the rains, September in Palmas offers a delightful blend of tropical elements.
In September, Palmas, Brazil experiences a refreshing transition, with temperatures ranging from a comfortable 5°C (41°F) at night to a warm 31°C (88°F) during the day. This month marks a shift towards milder weather, reflected in the average temperature of 18°C (64°F), making it an ideal time for outdoor activities. While the highs remain consistent with the summer warmth, the cooler evenings provide a pleasant reprieve, hinting at the gradual approach of autumn. As temperatures inch up from the previous month's lows, September serves as a delightful reminder of the region's diverse climate, combining the lingering warmth of the past months with a touch of crispness in the air.
In September, Palmas experiences a moderate shift in precipitation, receiving 98 mm (3.9 in) of rain over nine days. This marks a slight increase from the drier months of July and August, which recorded only 54 mm (2.1 in) and 93 mm (3.6 in) respectively, indicating a gradual return to the wetter conditions typical for the region as it transitions into the later months of the year. Following September, Palmas is expected to see a significant jump in rainfall, peaking in October with 188 mm (7.4 in), which highlights a clear upward trend as the year progresses towards the rainy season. This consistent pattern suggests that while September might offer a breather, the skies will soon open up, rejuvenating the lush landscapes surrounding Palmas.
In Palmas, Brazil, September marks a transitional moment in humidity patterns as levels settle at 75%. This slight dip follows the drier months of August, which registers the lowest humidity of the year at 70%. Interestingly, September's humidity begins to rise again, paving the way for a wetter season ahead. After a summer of higher humidity — peaking at 86% in May — the months leading up to September show a gradual decrease, culminating in this month’s moderate yet comfortable levels. As we move toward October, humidity creeps back up to 76%, suggesting that the lush, tropical climate typical of Palmas is regaining its foothold.
In September, Palmas, Brazil, experiences a notable UV Index of 11, categorizing it as extreme and demanding vigilance for sun exposure, with a burn time of just 10 minutes. This marks a continuation of the high UV levels typical for this region, following a brief respite in the cooler months of May through July, where the index dipped to 6 and 7. As summer approaches, the UV Index ramps back up to extremes, similar to the intensity seen earlier in the year. With such potent sunlight, it's essential to take precautions during this month, not just for skin health but also to enjoy the beautiful outdoor offerings of Palmas. For additional insights on UV exposure, check out the detailed guide here: Palmas UV Index.
UV Risk Categories
As September arrives in Palmas, Brazil, residents and visitors alike can bask in the comforting embrace of approximately 277 hours of sunshine. This month continues a trend of moderate warmth that has characterized the late winter and early spring. Following the sunnier months of August, with 275 hours, and the consistent brightness of July, which boasted 274 hours, September maintains a delightful balance of sunny days. As the region transitions toward the warmer months, the average daylight hours hint at an exciting peak on the horizon, especially as November and December promise even more radiant experiences with a stunning 308 and 334 hours of sunshine, respectively. This gradual climb sets the perfect stage for fall adventures under the sun-kissed sky of Palmas.
As September rolls into Palmas, Brazil, the likelihood of sun shines at 49%, placing it in the middle range of the year. This month strikes a harmonious balance, following the sunnier peaks of May and July, both boasting 63% chances. Notably, September's weather is closely aligned with its neighbor, August, which enjoys a 57% likelihood of sunny days. While sun-seekers might find better prospects in the earlier months of the year, September still holds its own, offering a delightful mix of sunshine that makes it a charming time for outdoor adventures before the cloudier October sets in, which dips to just 29%.
In Palmas, Brazil, the daylight duration showcases a captivating transformation throughout the year. Starting with 13 hours of daylight in January, the days gradually shorten to about 10 hours from May to July, creating a tranquil lull before the light begins to return. As the year progresses, daylight starts to extend again—marked by 11 hours in September—ushering in a gentle resurgence of sunshine. This pattern continues into October with 12 hours and reaches a peak of 13 hours once more by November and December. This cyclical dance of daylight not only defines the rhythm of life in Palmas but also invites residents and visitors alike to embrace the vibrant changes of each season.
In September, Palmas, Brazil, experiences a refreshing average wind speed of 3.4 m/s (8 mph), mirroring the breezy conditions of August. This gentle yet invigorating wind signifies the transition into the more vibrant months of spring, maintaining a steady pace that invites outdoor activities and exploration. Notably, as the seasons change, the wind speeds tend to remain consistent, with fluctuations generally hovering around the 3.0 to 3.6 m/s range throughout the year. This pattern underscores a reliable and pleasant climate, perfect for both relaxation and adventure in the heart of Brazil's lush landscapes.
Weather in Palmas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Palmas, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather experiences a broader range, with temperatures ranging from a cool 5°C (41°F) to a warm 31°C (88°F) and an average of 18°C (64°F). This month sees approximately 98 mm (3.9 in) of precipitation over about 9 days, contributing to a relatively humid environment with 75% humidity. Conversely, January offers a milder experience, with minimum temperatures of 12°C (54°F) and an average of 20°C (69°F), while still reaching a high of 31°C (89°F). However, it also brings increased precipitation, totaling 195 mm (7.7 in) across 18 days, contributing to a higher humidity level of 85%. Overall, January feels more humid and wetter compared to the drier, more variable conditions of September. For more details, you can explore Palmas weather in January.
September and February present distinct weather characteristics. September typically experiences a temperature range from a cool minimum of 5°C (41°F) to a warm average of 18°C (64°F), reaching up to a high of 31°C (88°F). With 98 mm (3.9 in) of precipitation over about 9 days, the humidity averages at 75%. In contrast, February sees slightly milder nights with a minimum of 8°C (46°F) and a higher average temperature of 20°C (68°F), still maxing out at 31°C (89°F). February is wetter, receiving 137 mm (5.4 in) of rain over 17 days, with humidity levels rising to 81%. For more information, check out Palmas weather in February.
September and March showcase distinct weather patterns, reflecting the transition into spring and autumn, respectively. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 31°C (88°F), with an average of 18°C (64°F). The month experiences around 98 mm (3.9 in) of precipitation over approximately 9 days, with a relative humidity of 75%.
In contrast, March sees milder conditions with a higher minimum temperature of 10°C (50°F) and a maximum of 30°C (86°F), resulting in a slight increase in the average to 19°C (67°F). Precipitation rises to 125 mm (4.9 in) spread over 15 days, along with increased humidity at 82%. For more specific details on March weather, you can visit Palmas weather in March.
When comparing the weather of September and April, it becomes clear that both months exhibit mild temperatures but vary in their characteristics. September generally sees higher temperatures with a minimum of 5°C (41°F) and reaching up to 31°C (88°F), while April has a slightly cooler range with a minimum of 3°C (37°F) and a maximum of 27°C (80°F). Precipitation is more pronounced in September, totaling 98 mm (3.9 in) over about 9 days, compared to April's 71 mm (2.8 in) over 7 days. Additionally, humidity levels are slightly higher in April at 84%, while September experiences a humidity of 75%. For more detailed insights on the weather conditions in April, you can check Palmas weather in April.
September and May present contrasting weather patterns. September typically experiences temperatures ranging from a minimum of 5°C (41°F) to a maximum of 31°C (88°F), with an average of 18°C (64°F). The month sees about 98 mm (3.9 in) of precipitation over 9 days and maintains a humidity level of 75%. In comparison, May has cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 26°C (80°F), averaging around 14°C (58°F). It also receives more rainfall, totaling 145 mm (5.7 in) over 10 days, accompanied by higher humidity at 86%. For a detailed look at May weather, visit Palmas weather in May.
September and June exhibit distinct weather patterns, with September generally offering warmer temperatures compared to June. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 31°C (88°F), with an average of 18°C (64°F). In contrast, June experiences cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 25°C (77°F), averaging 13°C (56°F).
Precipitation is another key difference; September sees about 98 mm (3.9 in) of rain over 9 days, while June is wetter, receiving 136 mm (5.4 in) over 10 days. Additionally, humidity levels are slightly higher in June at 84%, compared to 75% in September. For more information on what June has to offer, you can refer to Palmas weather in June.
When comparing the weather between September and July, it's clear that September tends to be warmer and wetter. In September, temperatures range from a minimum of 5°C (41°F) to a maximum of 31°C (88°F), with an average of 18°C (64°F). The month experiences higher precipitation at 98 mm (3.9 in) over 9 days and maintains a humidity level of 75%. In contrast, July has cooler temperatures ranging from a minimum of -4°C (25°F) to a maximum of 25°C (77°F), with an average of 13°C (55°F). July receives less rainfall, totaling 54 mm (2.1 in) across 6 days, and features slightly higher humidity at 77%. For more specific details about July weather patterns, you can check this link: Palmas weather in July.
September typically experiences warmer temperatures compared to August, with a minimum of 5°C (41°F) and an average of 18°C (64°F), while August has a minimum temperature of -2°C (29°F) and an average of 14°C (57°F). The maximum temperature in September can reach up to 31°C (88°F), surpassing August's peak of 29°C (84°F). Additionally, September sees slightly more precipitation, with 98 mm (3.9 in) over 9 days, compared to August's 93 mm (3.6 in) over 7 days. Humidity also rises in September at 75%, compared to 70% in August, making the atmosphere feel a bit more humid as the month progresses. For a detailed look at August weather, check Palmas weather in August.
In September, temperatures began to cool, with a minimum of 5°C (41°F) and an average of 18°C (64°F), while reaching a maximum of 31°C (88°F). The month saw moderate rainfall, totaling 98 mm (3.9 in) over 9 days and a humidity level of 75%. In contrast, October experiences slightly higher temperatures, with minimums still at 5°C (42°F) and an average of 18°C (64°F), but peaking at 32°C (90°F). Rainfall increases significantly to 188 mm (7.4 in) spread across 16 days, accompanied by a marginal uptick in humidity to 76%. For a more detailed look at the weather in October, check out Palmas weather in October.
In September, the weather tends to be warmer with average temperatures ranging from a cool 5°C (41°F) in the early mornings to a pleasant 31°C (88°F) during the afternoons. The month experiences moderate rainfall, with about 98 mm (3.9 in) over approximately 9 days, and humidity levels around 75%. In contrast, November sees a slight increase in both minimum and average temperatures, starting at a mild 9°C (48°F) and peaking at around 30°C (86°F). However, it is also a wetter month, with precipitation increasing to 148 mm (5.8 in) spread over about 12 days and a rise in humidity to 84%. For more detailed information, you can check Palmas weather in November.
In September, the weather typically sees temperatures ranging from a minimum of 5°C (41°F) to a maximum of 31°C (88°F), with an average of 18°C (64°F). During this month, there is an average precipitation of 98 mm (3.9 in) over 9 days, coupled with a humidity level of 75%. In contrast, December brings a warmer climate with temperatures ranging from a minimum of 7°C (46°F) to the same maximum of 31°C (88°F), averaging 20°C (68°F). However, December experiences significantly higher precipitation at 156 mm (6.1 in) over 16 days, along with increased humidity at 88%. For more details on the climate during this time, check out Palmas weather in December.
As summer starts to fade, September in Palmas ushers in a unique blend of warm days and cooler nights, setting it apart from the hotter months that follow. The average temperatures dip, providing a refreshing contrast, while humidity remains relatively high, giving the air a vibrant feel. Though rain falls on about nine days, the total precipitation adds a subtle touch of moisture rather than overwhelming downpours. This transitional month is a reminder of the balance between warmth and crispness, making it an inviting time for outdoor activities. For more insights into how September weather shapes up throughout the year, visit Palmas Climate.