Last updated: August 21, 2025
In September, Belém, Brazil experiences a delightful blend of warm temperatures and tropical humidity. With maximum highs reaching 32°C (89°F) and a comfortable average of 24°C (76°F), the city offers a pleasant climate for both locals and visitors. Nighttime brings cooler lows of around 19°C (66°F), creating a refreshing contrast. However, this month also sees around 29 mm (1.1 in) of rainfall spread over 12 days, contributing to the lush, vibrant landscapes typical of the Amazon region. Humidity remains high at 72%, enriching the air with a distinct tropical feel. Overall, September in Belém is a captivating experience filled with warmth, greenery, and the rhythmic pulse of rain.
In September, temperatures in Belém, Brazil, begin to shift slightly, marking a transition into the warmer months. With minimums around 19°C (66°F), the days start off pleasantly mild, while the average temperature remains comfortable at 24°C (76°F). However, as the month progresses, the maximum temperature can reach up to 32°C (89°F), pointing to the region's humid tropical climate. This subtle increase from the cooler months of July and August heralds the approach of a hotter season, making September an ideal time to enjoy Belém's vibrant culture and natural beauty before the peak heat sets in.
September in Belém, Brazil, marks a transition towards drier weather, with precipitation dropping to just 29 mm (1.1 in), accompanied by 12 rainy days. This decrease follows a peak during the earlier months; March and May, for instance, see notably higher rainfall of 108 mm (4.2 in) and 104 mm (4.1 in), respectively. In contrast to the wettest months, September's more sporadic showers signal the onset of a gradual drying trend that leads into the later months of the year. With only 10 days of rain expected in October, it’s clear that the region's precipitation patterns are shifting, creating a brief respite after the heavy rains of the mid-year. Overall, September serves as a vital indicator of changing seasons as the rainfall in Belém slowly retreats.
September marks a significant shift in the humidity landscape of Belém, Brazil, as it dips to 72%, the lowest point since the wetter months at the year's start. This decrease follows a gradual decline from the peak humidity levels observed in the preceding months of June through August, where the figures hovered around 80% to 89%. As the region transitions into the drier season, this change not only offers a reprieve from the heavy air but also sets the stage for the progressively lower humidity levels that will follow in October and November, at 68% and 66%, respectively. This trend highlights the unique climatic rhythm of Belém, where a blend of cooling air and diminishing moisture begins to weave its way into the vibrant tapestry of the city’s September days.
In September, Belem, Brazil experiences a UV Index of 13, placing it in the extreme exposure category with a burn time of just 10 minutes. This slight dip from August's UV Index of 12 indicates a marginal shift in sun intensity as the seasons transition, yet the risks remain significant. Throughout the year, Belem consistently sees high UV levels, particularly from January to April, where the index peaks at 15. To safely enjoy the vibrant outdoors, it's crucial for residents and visitors alike to take precautions against the sun's rays. For more details on UV exposure in Belem, check out the Belem UV Index.
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September in Belém, Brazil, boasts a delightful 328 hours of sunshine, making it one of the sunniest months of the year. This warm glow follows a summer peak in August, which recorded an impressive 335 hours of sunlight, and sets the stage for an even brighter October with 347 hours on the horizon. The trend reflects an ascending pattern as the year progresses, highlighting a gradual intensification of sunshine from the cooler months at the beginning of the year. As September unfolds, residents and visitors alike can revel in the lingering warmth before the year begins to wind down, enjoying the rich cultural experiences that flourish under the vibrant Brazilian sun.
In September, the chances of enjoying sunny weather in Belém, Brazil, significantly increase, reaching an encouraging 49%. This marks a noticeable upward trend as the month transitions from the relatively overcast conditions of winter, where the sun shines just 45% of the time in both July and June. Following September, the likelihood remains steady at 49% into November, suggesting a delightful continuation of improved weather. Overall, as the year progresses, September shines a light on the region's potential for vibrant, sun-kissed days, making it an ideal time for outdoor activities and exploration.
In September, Belém, Brazil, experiences a delightful return to 12 hours of daylight, marking a transition back to longer days after the slightly shorter span of 11 hours in the mid-year months. This pattern highlights a consistent annual rhythm, where the daylight duration stabilizes around 12 hours from January through March, and then again in October to December. The slight dip in daylight during April to August offers a refreshing contrast, yet September signals a rejuvenation of sunlight, inviting residents and visitors alike to bask in the warmth of the equatorial sun as the seasons shift. This reliable cadence not only shapes the region's climate but also influences the vibrant lifestyle of Belém's inhabitants, who thrive under the welcoming embrace of longer days.
As September rolls in, Belém, Brazil experiences a refreshing shift in its wind patterns, with average wind speeds reaching 4.0 m/s (9 mph). This marks a slight decline from the previous month’s robust 4.4 m/s (10 mph), yet still showcases an overall trend of increasing breeziness through the late winter and into spring. From the gentle whispers of January to the more noticeable gusts of late summer, the wind in Belém progressively picks up speed, peaking in August. As we transition into September, the moderate yet invigorating winds create a pleasant atmosphere, perfect for enjoying the lush surroundings and vibrant culture of this urban gem near the Amazon.
Weather in Belem varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Belem, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present a noticeable difference in weather patterns. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 32°C (89°F), with an average of 24°C (76°F). The month experiences a moderate level of precipitation at 29 mm (1.1 in) over approximately 12 days, accompanied by a humidity level of 72%. Conversely, January brings slightly warmer temperatures with a minimum of 21°C (70°F) and a maximum of 33°C (92°F), averaging 26°C (79°F). Additionally, it sees increased precipitation of 41 mm (1.6 in) across about 13 days and higher humidity at 86%. For more detailed information, you can check Belem weather in January.
In comparing the weather of September and February, we see notable differences in temperature and precipitation. September features a minimum temperature of 19°C (66°F), an average of 24°C (76°F), and a maximum of 32°C (89°F), with relatively low precipitation of 29 mm (1.1 in) over 12 days. Conversely, February tends to be warmer, with a minimum temperature of 21°C (70°F), an average of 26°C (80°F), and a maximum of 33°C (92°F). However, February also experiences higher precipitation, reaching 83 mm (3.3 in) across 17 days, accompanied by higher humidity at 89%. These factors contribute to a more humid environment in February compared to the milder, yet still humid September. For more specific insights, you can check Belem weather in February.
In September, the weather is warm with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 32°C (89°F), averaging around 24°C (76°F). The month sees moderate precipitation of 29 mm (1.1 in) over about 12 days, accompanied by a humidity level of 72%. In contrast, March offers slightly warmer conditions, with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 33°C (92°F), averaging 26°C (79°F). However, it experiences significantly higher rainfall, totaling 108 mm (4.2 in) over 22 days, and increased humidity at 89%. For more detailed information, check out Belem weather in March.
When comparing the weather in September and April, notable differences emerge in temperature and precipitation patterns. September sees a range of temperatures with a minimum of 19°C (66°F) and a maximum of 32°C (89°F), averaging around 24°C (76°F). In contrast, April presents slightly warmer conditions, with minimum temperatures starting at 21°C (69°F) and reaching highs of 32°C (91°F), averaging 26°C (78°F).
In terms of rainfall, September experiences less precipitation with only 29 mm (1.1 in) over 12 days, while April is significantly wetter, accumulating 99 mm (3.9 in) over 22 days. The humidity levels also differ, with September having a relatively lower humidity of 72%, compared to April's higher humidity at 89%. For a detailed overview of the April climate, you can visit Belem weather in April.
September and May both offer warm temperatures, but the overall weather conditions differ significantly. In September, the average temperature ranges from a minimum of 19°C (66°F) to a maximum of 32°C (89°F), with an average of 24°C (76°F) and relatively low precipitation of 29 mm (1.1 in) over 12 days, resulting in a humidity level of 72%. In contrast, May tends to be slightly warmer, with temperatures hitting a minimum of 20°C (68°F) and an average of 25°C (77°F), while also reaching up to 31°C (89°F). However, May is characterized by much higher rainfall, totaling 104 mm (4.1 in) over 18 days, and a humidity level of 90%. For more details, you can check Belem weather in May.
In June, temperatures in Belem range from a minimum of 19°C (66°F) to a maximum of 30°C (87°F), with an average temperature of 24°C (76°F). The month experiences higher humidity at 86% and more precipitation, totaling 56 mm (2.2 in) over 15 days. In contrast, September also has a minimum of 19°C (66°F) and an average of 24°C (76°F), but the maximum temperature rises slightly to 32°C (89°F). Additionally, precipitation decreases to 29 mm (1.1 in) over 12 days, and humidity lowers to 72%. Overall, while both months share similar minimum and average temperatures, September is generally warmer and drier. For more details, check out Belem weather in June.
In September, the weather generally shows a slight increase in temperatures compared to July, with minimums of 19°C (66°F) and maximums reaching 32°C (89°F), compared to July's minimum of 18°C (65°F) and maximum of 30°C (86°F). The average temperature in September is also a bit higher at 24°C (76°F), whereas July averages at 23°C (74°F). However, September experiences less precipitation, with only 29 mm (1.1 in) over 12 days compared to July's 71 mm (2.8 in) over 15 days. Additionally, July tends to be more humid at 80% compared to September's 72%. For more details on July weather, check out Belem weather in July.
In comparing the weather between August and September, both months exhibit warm temperatures, with September slightly warmer, featuring a minimum of 19°C and a maximum of 32°C, compared to August's range of 18°C to 30°C. The average temperature remains consistent at around 24°C for both months. However, September experiences a bit more precipitation, totaling 29 mm over 12 days, making it slightly wetter than August, which has 30 mm spread across 10 days. Humidity levels are also noteworthy; while August has a higher humidity at 77%, September sees a slight decrease to 72%. For those interested in more details about August weather specifically, check out Belem weather in August.
September's weather presents a transition into the fall with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 32°C (89°F), along with an average of 24°C (76°F). It is relatively humid, with an average humidity of 72% and 29 mm (1.1 in) of precipitation over 12 days. In contrast, October sees a slight increase in average temperature, rising to 25°C (78°F), while maintaining the same high of 32°C (90°F). The month experiences slightly less precipitation, with 25 mm (1.0 in) over 10 days and a drop in humidity to 68%. For a detailed look at the weather in October, you can check Belem weather in October.
In September, temperatures typically range from a minimum of 19°C (66°F) to a maximum of 32°C (89°F), with an average of 24°C (76°F). This month experiences about 29 mm (1.1 in) of precipitation across 12 days, accompanied by a humidity level of 72%. In contrast, November sees slightly warmer temperatures, with a minimum of 20°C (69°F), an average of 26°C (79°F), and a maximum of 33°C (91°F). Precipitation decreases to 23 mm (0.9 in) over only 8 days, and humidity also drops to 66%. For a more detailed look at the weather during this month, check out Belem weather in November.
In September, the weather typically features a minimum temperature of 19°C (66°F) and an average of 24°C (76°F), with a maximum reaching 32°C (89°F). The month experiences about 29 mm (1.1 in) of precipitation over approximately 12 days, accompanied by a humidity level of 72%. In contrast, December sees slightly warmer conditions, with a minimum temperature of 20°C (67°F) and an average of 26°C (79°F), peaking at 33°C (91°F). This month also has increased rainfall, totaling 38 mm (1.5 in) over around 15 days, while maintaining a lower humidity of 70%. For more detailed information, you can check Belem weather in December.
September in Belém brings a notable shift in weather, characterized by warm temperatures and a moderate level of humidity that creates a tropical feel. With average temperatures hovering around 24°C (76°F), this month stands out for its relative warmth compared to the cooler months preceding it. Rainfall is also a common feature, with rain gracing the skies on about half the month, making it a wetter period than the dry summer months. This combination of heat and rain enhances the lush landscapes typical of Belém, inviting residents and visitors alike to embrace the beauty of this tropical paradise. For more detailed insights, check out Belem Climate.