Last updated: August 21, 2025
In Itacoatiara, Brazil, the weather in September presents a warm tropical experience, with maximum temperatures reaching 35°C (96°F) and a comfortable average of 29°C (84°F). Nights cool down to a minimum of 23°C (74°F), offering relief from the daytime heat. Although this month sees 91 mm (3.6 in) of rain across approximately 12 days, the humidity remains a manageable 43%, making it an appealing time for outdoor activities amidst occasional showers. Embrace the vibrant atmosphere as you explore this unique Brazilian locale!
In September, Itacoatiara experiences warm and inviting temperatures, marking a transition into the height of its tropical climate. With a minimum of 23°C (74°F) and an average of 29°C (84°F), the month maintains a consistent warmth throughout the day. The maximum temperatures can soar to 35°C (96°F), similar to the preceding months. This warmth, combined with the steady humidity characteristic of the Amazon region, creates an inviting atmosphere for outdoor activities and exploration. Overall, September represents a peak in the region's warmth and serves as a precursor to the slightly cooler months that follow, making it a delightful time to enjoy the natural beauty of this Brazilian gem.
In September, Itacoatiara experiences a noticeable shift in precipitation patterns, with an average of 91 mm (3.6 in) of rain over 12 days, marking a slight increase from the drier months of August, which recorded only 59 mm (2.3 in). This uptick hints at the transition towards the more humid rainy season, setting the stage for a resurgence in rainfall as the year progresses. With the number of rainy days beginning to rise again, residents can expect the lush landscapes to start flourishing once more, foreshadowing the heavier rains of October and subsequent months. The gradual return to wetter days highlights the region's vibrant climate cycle, where each month brings its own unique rhythm of rain.
In Itacoatiara, Brazil, the month of September marks a significant decline in humidity, dropping to a refreshing 43%. This is a sharp contrast to the preceding months, particularly the high levels seen in May at 90% and April at 88%. The trend reveals a gradual decrease as the year progresses, with August already at a more comfortable 59%. Following September, humidity continues to fall, reaching its annual low of 32% in October, before slightly rebounding towards the end of the year. This seasonal variation highlights a shift from the oppressive moisture of the earlier months to a crisper, more inviting atmosphere, ideal for outdoor activities and exploration.
In September, Itacoatiara, Brazil experiences a UV Index of 12, categorizing this month as part of the extreme exposure range. This is a slight decrease from the high values seen earlier in the year, with January and February peaking at UV Index 16. While the burn time remains consistently short at just 10 minutes, it's essential to remain vigilant. The trend shows that as the year progresses, the UV Index drops from its peak in the early months, but it still retains its extreme classification through September and beyond. To stay informed and protect your skin, check out the detailed Itacoatiara UV Index.
UV Risk Categories
Itacoatiara, Brazil, basks in September sunshine with an impressive 309 hours of sunlight, continuing the trend of the previous months. Following the peak sunshine months of July and August, where daylight soared to 327 and 328 hours respectively, September offers a slight retreat while still providing ample brightness. This notable consistency in sunny days throughout the winter months showcases the vibrant appeal of Itacoatiara, making it an enticing destination for sun-seekers. As temperatures transition, the favorable sunlight persists through October, ensuring that the allure of the sun lingers just a little longer, perfect for beach lovers and outdoor enthusiasts alike.
In Itacoatiara, Brazil, September sees a promising 39% chance of sunny weather, marking it as one of the more favorable months compared to the earlier part of the year. Following the sun-drenched months of July and August, where the likelihood peaked at 45% and 44% respectively, September maintains a strong probability of bright skies, offering a delightful transition into spring. This trend underscores that as the year progresses from the cooler months, the chances for sunlight increase significantly, making September an ideal time for outdoor activities and enjoying the picturesque coastal landscape.
In Itacoatiara, Brazil, the rhythm of daylight remains remarkably consistent throughout the year. From January to April, residents bask in a steady 12 hours of daylight, creating a seamless transition from the vibrant energy of summer to the subtle shifts of early autumn. As we move into May through August, daylight gently tapers to 11 hours, signaling the arrival of winter's cooler embrace. However, September marks a delightful return to 12 hours of daylight, reuniting the day with the sun’s warm glow just in time for the blossoming spring. This cyclical pattern reveals a fascinating balance between light and dark, allowing the community to enjoy nature's beauty year-round.
As the month of September arrives in Itacoatiara, Brazil, the gentle breeze brings a refreshing sense of transition, with an average wind speed of 1.7 m/s (about 4 mph). This slight uptick mirrors a consistent pattern observed throughout the year, where the wind speeds fluctuate modestly but remain generally calm. From the beginning of the year until now, winds have typically hovered around the 3 to 4 mph mark, peaking slightly in February and October. September's breeze is reminiscent of the late summer winds, offering a comfortable environment ideal for outdoor activities and relaxation by the shores. As one unwinds in this serene coastal paradise, it becomes clear that the September winds serve as a precursor to the subtle changes that will unfold in the months ahead.
Weather in Itacoatiara varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Itacoatiara, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically warm and dry, with average temperatures reaching 29°C (84°F) and maximums peaking at 35°C (96°F). The month sees relatively low humidity at 43% and only 91 mm (3.6 in) of precipitation over 12 days. In contrast, January experiences a more humid climate, with an average temperature of 27°C (80°F) and daily highs around 33°C (92°F). The rainfall drastically increases to 267 mm (10.5 in), occurring over 23 days, leading to a much wetter atmosphere with a humidity level of 86%. For more details on the January weather, visit Itacoatiara weather in January.
When comparing the weather in September and February, it is clear that February experiences cooler average temperatures and significantly higher humidity. In September, the minimum temperature is around 23°C (74°F), with an average of 29°C (84°F) and a maximum of 35°C (96°F). In contrast, February has a similar minimum temperature of 23°C (73°F), but the average drops to 27°C (80°F) and the maximum reaches 32°C (91°F). Precipitation is also markedly higher in February, with 297 mm (11.7 in) over 24 days, compared to September's 91 mm (3.6 in) over just 12 days. This suggests that February is not only cooler but also wetter, resulting in a much more humid environment. For more details about February weather, you can visit Itacoatiara weather in February.
In September, the weather is typically warmer with average temperatures reaching 29°C (84°F) and maximum highs of 35°C (96°F). The humidity is relatively low at 43%, and there is moderate precipitation, with 91 mm (3.6 in) falling over 12 days. In contrast, March experiences cooler average temperatures at 27°C (81°F) and maximums of 33°C (93°F). However, this month is significantly wetter, with total precipitation soaring to 315 mm (12.4 in) spread across 26 days, and humidity levels rising to a high 81%. For a detailed look at the weather in March, you can check out Itacoatiara weather in March.
In comparing the weather between September and April, it's clear that both months share a similar minimum temperature of 23°C (74°F), but September typically enjoys warmer average and maximum temperatures, at 29°C (84°F) and 35°C (96°F) respectively, compared to April's average of 27°C (81°F) and maximum of 34°C (93°F). However, April experiences significantly higher precipitation, with 387 mm (15.2 in) spread over 28 days, contrasting sharply with September's 91 mm (3.6 in) over just 12 days. Additionally, humidity levels are considerably elevated in April at 88%, while September maintains a more moderate humidity of 43%. For a deeper look into April's weather patterns, you can refer to Itacoatiara weather in April.
The weather in September presents a warmer and drier climate compared to May. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 35°C (96°F), with an average of 29°C (84°F) and relatively low humidity at 43%. In contrast, May sees slightly cooler temperatures, with a minimum of 23°C (74°F) and a maximum of 33°C (92°F), averaging 27°C (81°F), but it is characterized by significantly higher precipitation at 285 mm (11.2 in) over 28 days and much higher humidity at 90%. For more insight into the weather patterns in May, you can check Itacoatiara weather in May.
In comparing the weather conditions of September and June, we see notable differences in temperature and precipitation. September tends to be slightly warmer, with average temperatures reaching 29°C (84°F) and maximums peaking at 35°C (96°F), while June has an average of 28°C (82°F) and a maximum of 33°C (92°F). However, June experiences significantly higher humidity, averaging 84%, which contributes to its overall muggy feel compared to September's more comfortable 43% humidity. Rainfall is another distinguishing factor; September receives 91 mm (3.6 in) of precipitation over 12 days, whereas June sees much heavier rainfall at 143 mm (5.6 in) across 23 days. For more details about the specific weather conditions in June, you can refer to Itacoatiara weather in June.
In September, the weather is slightly warmer than in July, with average temperatures reaching 29°C (84°F) compared to July's 28°C (83°F). Both months share a similar minimum temperature of around 23°C (74°F). However, September experiences slightly higher maximum temperatures of 35°C (96°F), while July peaks at 34°C (93°F). Precipitation also varies, as September receives 91 mm (3.6 in) over 12 days, whereas July has 78 mm (3.1 in) but spans 16 days of rainfall. Notably, September has a lower humidity level at 43%, in contrast to July's much higher 77%. For a deeper dive into July's weather patterns, you can explore Itacoatiara weather in July.
In September, the temperatures remain consistent with those in August, featuring minimums of 23°C (74°F), average highs of 29°C (84°F), and maximums reaching 35°C (96°F). However, September sees an increase in precipitation to 91 mm (3.6 in) over 12 days, compared to August's 59 mm (2.3 in) over just 10 days. Notably, humidity also drops significantly from 59% in August to 43% in September, creating a slightly less muggy environment despite the increased rainfall. For more detailed weather insights, you can check Itacoatiara weather in August.
In comparing the weather between September and October, both months exhibit similar average temperatures, with September showing a minimum of 23°C (74°F) and a maximum of 35°C (96°F), while October slightly lowers the minimum to 22°C (73°F). However, October experiences increased precipitation, totaling 126 mm (5.0 in) over 15 days, compared to September's 91 mm (3.6 in) over 12 days. Despite the rise in rainfall, October's humidity is lower at 32%, compared to September’s 43%. For more detailed insights on weather during this month, you can check Itacoatiara weather in October.
In September, the weather is generally warm, with temperatures ranging from a minimum of 23°C (74°F) to an average high of 35°C (96°F). The month experiences relatively low precipitation, totaling 91 mm (3.6 inches) over about 12 days, and humidity levels around 43%. In contrast, November sees a slight decrease in average temperature, with highs averaging 28°C (83°F) while still reaching maxima of 35°C (95°F). However, November is markedly wetter, recording 245 mm (9.6 inches) of rainfall over 22 days, and slightly lower humidity at 39%. For more details, you can check Itacoatiara weather in November.
In September, the weather is generally warm with average temperatures around 29°C (84°F), peaking at a maximum of 35°C (96°F). The month sees moderate rainfall of 91 mm (3.6 in) spread across about 12 days, with a lower humidity level of 43%. In contrast, December experiences slightly cooler average temperatures of 27°C (81°F) and a maximum of 34°C (94°F). However, it is significantly wetter, receiving 335 mm (13.2 in) of precipitation over approximately 27 days, resulting in a much higher humidity of 85%. For more detailed weather information, you can visit Itacoatiara weather in December.
As September arrives in Itacoatiara, it brings a warm embrace with its average temperatures hovering around a balmy 29°C. This month's weather stands out with a notable drop in humidity to 43%, making it feel more comfortable compared to the heavier moisture experienced in preceding months. While the region still encounters some rain, with precipitation occurring on about 12 days, the overall atmosphere tends to be more pleasant as the wet season slowly transitions. This shift offers a delightful opportunity to explore the rich natural beauty of the Amazon. For a deeper understanding of what to expect throughout the year, visit Itacoatiara Climate.