September Weather in Goias, Brazil

Last updated: August 21, 2025

In September, Goias, Brazil, experiences warm temperatures with a maximum reaching 40°C (104°F) and an average of 29°C (84°F), while the minimum dips to a comfortable 17°C (62°F). This month is characterized by minimal rainfall, totaling only 6 mm (0.2 in) across just 1 day, contributing to the region's overall 33% humidity level. Ideal for outdoor activities, September offers a perfect opportunity to enjoy the vibrant landscapes and cultural richness of Goias under sunny skies.

September Temperature in Goias

In September, Goiás, Brazil, transitions into a notably warmer phase, characterized by minimum temperatures around 17°C (62°F) and an average that swells to a comfortable 29°C (84°F). As the month progresses, the mercury can soar, reaching maximums of 40°C (104°F), making it one of the hottest months of the year. This upward trend from the cooler winter months sees a marked shift, as September bridges the gap between the mild temperatures of winter and the sweltering heat of summer. The increase in warmth not only enhances the region's vibrant landscapes but also invites a lively atmosphere, perfect for outdoor activities and celebrations, as the days grow longer and sunnier.

September Weather in Goias: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Goias, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Goias, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec787777777575747984827877
Data source: Temperature data for Goias generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Goias

September in Goias, Brazil, marks a notable shift in the precipitation pattern as the dry winter months give way to the anticipation of the rainy season. With just 6 mm (0.2 in) of rainfall recorded over a single day, this month stands out as a transitional time, following an almost rainless August. This slight uptick in precipitation hints at the changing climatology, paving the way for the more substantial rains that typically arrive in October and onward. By comparing September’s modest totals to the heavier downpours seen from November to January, it’s clear that this month serves as a bridge between the arid winter and the lush, wet summer months that follow.

September Precipitation Trends in Goias

The chart displays monthly precipitation patterns in Goias, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Goias, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec15322317692100016104190254
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Goias

In Goias, Brazil, September marks a notable shift in humidity levels, dipping to 33%, the lowest point of the year. This decline follows a gradual decrease from the lush, high humidity months of January through August, showcasing a significant transition as the region moves into drier conditions. The trend reveals a contrast between the early part of the year, where humidity hovers between 87% and 89%, and the late-year months, which return to higher levels, peaking again at 84% in December. Such fluctuations not only signal a change in weather patterns but also greatly influence the local climate experience, making September a distinct period of dryness.

September Average Humidity in Goias

This chart illustrates the average monthly humidity levels in Goias, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Goias is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%89%89%83%68%60%53%43%33%29%61%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Goias

In September, Goias, Brazil, experiences an UV Index of 12, categorized as extreme, marking a slight increase from August's UV levels. This time of year, with a burn time of just 10 minutes, highlights the region's relentless sun exposure, a trend that dominates the months preceding it. The UV Index during the colder months dips only slightly, adhering to the extreme category, and surpasses the very high rating seen in May through July. As the year progresses towards the end of the dry season, residents and visitors alike must remain vigilant against sunburn. For more information on UV exposure and safety measures, check out Goias UV Index.

Maximum UV Index Levels in Goias for September

The chart shows the monthly maximum UV Index (UVI) for Goias in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Goias typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1516141210991112141516
Data source: Goias September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Goias

September in Goiás, Brazil, is truly a golden month, basking in an impressive 328 hours of sunshine that reflects the region's consistently bright climate. As we transition from the heavy sunshine of May, which boasts 326 hours, and the steady warmth of the preceding months, September maintains a delightful balance before the year winds down. Interestingly, the sunshine hours peak around mid-year, with July and August both enjoying 332 hours. As autumn approaches, the slight dip in hours from summer's highs still ensures that days remain vibrant, making September a perfect time to savor the great outdoors. With the sun making its mark, it's clear that Goiás remains a haven for sun-seekers even as the season shifts.

Monthly Sunshine Duration in Goias: September Highlighted

The September sunshine duration represents the total number of hours Goias experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec247h256h295h308h326h315h332h332h328h325h278h284h
Data source: Goias September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Goias During September

September in Goiás, Brazil, offers a promising 73% chance of sunny weather, making it a delightful choice for outdoor activities and explorations. As the dry season peaks, the likelihood of sunshine builds significantly from the earlier months, climbing from a mere 17% in January to an impressive 95% in July. With the clear skies of August still lingering, September’s weather transition continues to provide ample sunshine, encouraging locals and tourists alike to embrace the warm days ahead. This trend of increasingly favorable weather from May through September not only highlights the region’s climatic appeal but also sets the stage for a vibrant and enjoyable start to the spring season.

Percentage of Sunny Days in September in Goias

The chart illustrates the percentage of sunny days in Goias throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Goias experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec17%21%26%45%55%64%95%67%73%30%9%23%
Data source: Goias September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Goias in September

In September, the daylight in Goiás, Brazil, returns to a bright 12 hours, signaling the transition towards the longer days of spring. This month, along with January, February, October, and November, consistently enjoys equal sunlight, creating a rhythm of balance amidst a backdrop of shifting daylight. Meanwhile, the cooler months from April to August see a gradual decline to 11 hours of daylight, illustrating a natural ebb in brightness as the region moves through winter. As December approaches, the daylight extends to 13 hours, wrapping up the year with the promise of longer, sun-kissed days ahead. This pattern highlights the enchanting cycle of light that defines the seasonal experience in Goiás.

Average Daylight Hours in Goias for September

The chart illustrates the variation in daylight duration in Goias throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 56m12h 35m12h 9m11h 42m11h 21m11h 10m11h 16m11h 35m12h12h 27m12h 50m13h 2m
Data source: Goias daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Goias

As September rolls into Goiás, Brazil, the winds begin to gently assert themselves, averaging 2.2 m/s (5 mph) this month. This marks a slight dip from the more robust breezes of July and August, which both enjoyed an average of 2.6 m/s (6 mph). The wind speed in September continues the gradual increase observed in the earlier months of the year, starting from around 1.6 m/s (4 mph) in the first half of the year, but it seems we've hit a brief plateau before the winds further settle down in October. This month serves as a transition, showcasing the dynamic nature of Goiás' breezes, as they shift subtly but steadily, preparing the landscape for the upcoming fall.

Average September Wind Speed in Goias

The chart displays monthly wind speed patterns in Goias, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.61.61.61.92.22.42.62.62.2 m/s2.11.61.7
Data source: Goias September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Goias Compares to Other Months

Weather in Goias varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Goias, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present contrasting weather conditions. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 40°C (104°F), with an average of 29°C (84°F). The month sees minimal precipitation, with only 6 mm (0.2 in) falling over just 1 day, and humidity levels are relatively low at 33%. In stark contrast, January experiences higher humidity at 87% and significantly more rain, totaling 153 mm (6.0 in) across about 16 days. The temperature is milder, with a minimum of 20°C (68°F), an average of 25°C (78°F), and a maximum of 35°C (96°F). For more details, you can check the Goias weather in January.

September and February exhibit stark differences in weather conditions. In September, temperatures can range from a pleasant minimum of 17°C (62°F) to a scorching maximum of 40°C (104°F), with an average of 29°C (84°F). The month is characterized by minimal precipitation, with only about 6 mm (0.2 in) falling on just one day, and a low humidity level of 33%. In contrast, February sees milder temperatures with a minimum of 20°C (67°F) and a maximum of 36°C (97°F), averaging 25°C (77°F). However, it experiences significantly higher rainfall, totaling 223 mm (8.8 in) over 23 days, and a much higher humidity level of 89%. For more details on February's climate, you can check Goias weather in February.

In comparing the weather between September and March, it becomes evident that each month presents distinct characteristics. September boasts a warmer climate, with average temperatures reaching up to 29°C (84°F) and a maximum of 40°C (104°F). This month typically experiences very little rain, with only 6 mm (0.2 in) of precipitation over just one day and a low humidity level of 33%.

In contrast, March is cooler, with an average temperature of 25°C (78°F) and a maximum of 35°C (94°F). However, March is significantly wetter, receiving 176 mm (6.9 in) of rainfall over 23 days, accompanied by high humidity levels of 89%. For more detailed weather information specific to March, you can check Goias weather in March.

September and April exhibit contrasting weather patterns, with September typically marked by hotter temperatures and lower humidity. In September, daytime highs can reach up to 40°C (104°F), while April's maximum temperature is a milder 35°C (95°F). Additionally, September experiences minimal precipitation, averaging only 6 mm (0.2 in) over just one day, whereas April is significantly wetter, with 92 mm (3.6 in) of rainfall spread over 14 days. The humidity in September is considerably lower at 33%, compared to the high humidity levels of 83% in April. For more detailed insights into April weather in Goias, check out Goias weather in April.

In comparing the weather of September and May, it’s clear that September is significantly warmer, with an average temperature reaching 29°C (84°F) and highs soaring up to 40°C (104°F). In contrast, May experiences milder conditions, with average temperatures around 24°C (76°F) and maximums of 33°C (92°F). September is relatively dry with only 6 mm (0.2 in) of precipitation over just one day, while May sees a bit more rain at 10 mm (0.4 in) across two days, contributing to higher humidity levels of 68% compared to September's 33%. For a detailed look at the weather specifics for May, you can refer to Goias weather in May.

September tends to be warmer than June, with average temperatures reaching up to 29°C (84°F) and highs hitting 40°C (104°F). In contrast, June's temperatures are milder, with an average of 24°C (75°F) and a maximum of 33°C (92°F). Additionally, September experiences very little precipitation with only 6 mm (0.2 in) over just one day, while June remains completely dry with no recorded rainfall. Humidity levels also differ significantly, with September at 33% compared to June's much higher 60%. For more specific details about June weather in Goias, you can visit Goias weather in June.

In comparing the weather between September and July, September experiences significantly warmer temperatures, with a minimum of 17°C (62°F) and an average of 29°C (84°F), peaking at a sweltering 40°C (104°F). In contrast, July offers a much cooler atmosphere, with temperatures ranging from a minimum of 9°C (49°F) to an average of 23°C (74°F), and a maximum of 33°C (91°F). Additionally, September sees a minor amount of precipitation at 6 mm (0.2 in) over just one day, while July remains dry, recording no precipitation at all. The humidity also differs considerably, with September's lower humidity at 33% compared to July's higher 53%. For further details on July's weather, you can visit Goias weather in July.

In September, temperatures generally soar higher than in August, with an average of 29°C (84°F) compared to August's average of 26°C (79°F), while the maximum reach is notably elevated at 40°C (104°F) versus 37°C (99°F) in August. Although both months experience low precipitation, September sees slightly more rain, accumulating 6 mm (0.2 in) over one day, whereas August records virtually none at 1 mm (0.0 in) and 0 rainy days. Additionally, the humidity decreases from 43% in August to 33% in September, making the latter month feel slightly drier. For more detailed information on August weather patterns, you can explore Goias weather in August.

September and October present a transition in weather patterns. In September, temperatures range from a minimum of 17°C (62°F) to a maximum of 40°C (104°F), with an average of 29°C (84°F). The month sees minimal precipitation, with only 6 mm (0.2 in) and just one rainy day, while humidity hovers around 33%. In contrast, October features slightly higher minimum temperatures at 18°C (64°F) and a marginally lower average of 28°C (82°F), with maximums rising to 41°C (106°F). However, October is significantly wetter, with 104 mm (4.1 in) of precipitation spread over 13 days and humidity levels at 28%. This shift highlights October as a month of increased rainfall and varying temperatures. For more detailed insights, you can visit Goias weather in October.

September typically boasts warmer weather with average temperatures reaching up to 29°C (84°F) and maximum highs of 40°C (104°F). In contrast, November experiences cooler temperatures, with an average of 25°C (78°F) and maximums of 36°C (96°F). Additionally, September is relatively dry, receiving only 6 mm (0.2 in) of precipitation over just 1 day, while November is much wetter, totaling 190 mm (7.5 in) across 23 days. This increase in rainfall contributes to a higher humidity level of 61% in November, compared to a drier 33% in September. For more detailed information, you can check Goias weather in November.

September and December present stark contrasts in weather patterns. In September, temperatures range from a minimum of 17°C (62°F) to a scorching maximum of 40°C (104°F), with an average of 29°C (84°F) and only 6 mm (0.2 inches) of precipitation over just one day, alongside low humidity levels at 33%. Conversely, December features milder temperatures, with a minimum of 19°C (67°F) and a maximum of 35°C (96°F), averaging 25°C (78°F). However, this month is also characterized by significant rainfall, totaling 254 mm (10.0 inches) over 23 days, resulting in much higher humidity levels at 84%. This dramatic shift in conditions highlights the transition from the dry heat of late summer to the wetter, more humid atmosphere of the rainy season. For more information, check out Goias weather in December.

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Conclusion: What to Expect From September Weather in Goias

As September rolls in, Goias experiences a noticeable shift in weather with the typical warmth of the dry season firmly establishing itself. The average temperature rises to a comfortable 29°C (84°F), inviting outdoor enthusiasts to enjoy the sun. Unlike the previous months, September boasts a significantly lower precipitation level, with only one rainy day contributing a mere 6 mm (0.2 in) of rainfall. The humidity remains relatively low at 33%, creating a pleasant atmosphere perfect for exploring the region. This month presents an ideal time for visitors to experience Goias before the intense heat of summer sets in. For more detailed insights into goings-on year-round, check out Goias Climate.