Last updated: August 21, 2025
In September, Cuiaba, Brazil experiences a striking blend of warm temperatures and low humidity, making it a unique time of year. With maximums reaching 41°C (106°F) and an average temperature of 29°C (84°F), the days can feel intensely hot. However, the nights offer a refreshing contrast, dipping to a minimum of 12°C (54°F). While precipitation is relatively low at 26 mm (1.0 in) over five days, the dry air, with humidity levels around 30%, adds to the arid feel of the season. This combination of heat and minimal rain creates a vibrant atmosphere, perfect for those seeking to explore the region's natural beauty.
September in Cuiabá, Brazil, marks a vibrant transition as temperatures continue to climb, showcasing the region's tropical charm. With a minimum of 12°C (54°F), the nights remain comfortably cool, while daytime highs reach an impressive 41°C (106°F), making it one of the hottest months of the year. The average temperature hovers around 29°C (84°F), reflecting a trend of increasing warmth as the seasons shift toward the sweltering heat of October. This month encapsulates Cuiabá's tropical energy, inviting both locals and visitors to embrace the sun-soaked days and balmy evenings. As the humidity begins to rise, adventure seekers and nature lovers are drawn to the nearby natural wonders, making September a lively time to explore the beauty of this Brazilian gem.
September in Cuiabá marks a subtle transition in the region's weather patterns, with precipitation amounting to 26 mm (1.0 in) over just five rainy days. This slight increase from August's minimal rainfall reflects the onset of a more humid season, though it remains significantly lower compared to the bountiful rains experienced in the earlier months like February and March, which average over 200 mm. As the dry spell of winter recedes, September serves as a gentle precursor to the heavier rainfall that follows in October and November, where precipitation levels can soar back to over 100 mm. The gradual uptick in rain hints at Cuiabá's looming wet season, setting the stage for the vibrant vegetation and energized ecosystem that follows.
In Cuiabá, Brazil, September marks a significant shift in humidity levels, plummeting to just 30%. This trend encapsulates the transition from the oppressive moisture of the preceding months—where humidity often hovered above 80%—to a drier atmosphere that sets the stage for the upcoming dry season. Following August’s low of 39%, September continues the downward trajectory, with October potentially dipping even further to 29%. This drop in humidity not only brings relief from the intense tropical conditions but also hints at the region’s distinct seasonal variations, transitioning from the wet and humid months into a drier spell.
In September, Cuiabá, Brazil experiences a UV Index of 12, categorizing it as extreme and necessitating a burn time of just 10 minutes. This month continues the trend of high UV exposure seen throughout the year, with levels remaining notably elevated from April's 13 to October's 14. With January and February rocking a staggering UV index of 16, these figures emphasize the necessity for sun protection during this period. As the season transitions into more favorable conditions post-winter, the UV Index stabilizes around the upper range of extremes, making awareness and preparation key for outdoor enthusiasts. For a full overview of UV trends throughout the year, check out Cuiaba UV Index.
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In Cuiaba, Brazil, September shines brightly with an impressive 315 hours of sunshine, marking the transition into spring and offering a warm embrace after the winter months. This delightful month continues the trend of high solar exposure, following a summer of record sunshine in July and August, where the city enjoyed 330 and 328 hours, respectively. As the year progresses, it's clear that Cuiaba thrives on its abundant sunlight, with only November dipping below the month’s average of hours, making September a perfect time to bask in the Brazilian warmth and enjoy the vibrant outdoor activities the city has to offer. As daylight continues to linger, visitors and locals alike can revel in the rich beauty of this tropical paradise.
In Cuiabá, Brazil, September marks a transition into sunnier days, with a 66% chance of sunshine illuminating the sky. This follows the peak sunny months of July and August, which showcase the region's warm weather trends with impressive probabilities of 91% and 78%, respectively. As the dry season starts to wane, September presents a delightful balance, where the likelihood of clear skies remains significantly higher than the wetter months that follow, such as October and November, which see chances plummet to 35% and a mere 9%. Thus, September stands out as an ideal time to revel in the vibrant sun and enjoy outdoor activities, making it a favored month for both locals and visitors alike.
In Cuiabá, Brazil, the rhythm of daylight presents a fascinating trend as the year progresses. January through March enjoys a generous 12 hours of daylight, basking in the sun's warmth. However, as the year transitions into April, daylight begins to gradually shorten to 11 hours from April to August, creating a subtle shift towards cooler evenings. Remarkably, September signals a return to 12 hours of daylight, reintroducing longer, sunlit days just as the year begins to turn towards its end. This cycle culminates in December, when daylight reaches its peak at 13 hours, offering the longest days of the year. This pattern reflects the harmonious balance of seasonal change in this vibrant region.
In September, Cuiabá experiences a refreshing breeze with an average wind speed of 2.1 m/s (5 mph). While slightly less brisk than the peak summer months of July and August, this moderate wind continues to provide relief from the heat. Trend analysis reveals a gradual increase in wind speeds starting in May, peaking in August, before settling into a comfortable pace for September and October. Overall, this month marks a transition, as the winds recede from their summer heights yet still offer a pleasant and refreshing environment for outdoor activities. As the year progresses, the wind patterns shift again, hinting at a return to calmer conditions by November and December.
Weather in Cuiaba varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cuiaba, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase striking contrasts in weather conditions. In September, temperatures range from a minimum of 12°C (54°F) to a scorching maximum of 41°C (106°F), with an average of 29°C (84°F). The month experiences relatively low humidity at 30% and minimal precipitation of 26 mm (1.0 in) over just 5 days. In stark contrast, January features a milder temperature range with a minimum of 22°C (72°F) and a maximum of 37°C (98°F), an average of 27°C (81°F), and significantly higher humidity at 88%. Additionally, January sees a considerable increase in rainfall, totaling 168 mm (6.6 in) over 21 days. For more details on January weather, check out Cuiaba weather in January.
September and February present strikingly different weather experiences. In September, temperatures range from a minimum of 12°C (54°F) to a maximum of 41°C (106°F), with an average of 29°C (84°F). The month also sees relatively low humidity at 30% and light precipitation of 26 mm (1.0 in) over about 5 days. In contrast, February is marked by much warmer temperatures, with lows of 21°C (70°F) and highs reaching 35°C (95°F), averaging 27°C (80°F). This month is significantly wetter, receiving 224 mm (8.8 in) of rain spread over 24 days, along with high humidity levels of 88%. For more detailed insights into February's weather, check out Cuiaba weather in February.
In September, the weather tends to be warm and dry, with temperatures ranging from a minimum of 12°C (54°F) to a scorching maximum of 41°C (106°F), and an average temperature of 29°C (84°F). The month experiences relatively low precipitation, totaling only 26 mm (1.0 in) over about 5 days, accompanied by low humidity levels at around 30%.
In stark contrast, March presents a much different climate, with milder temperatures that range from a minimum of 21°C (70°F) to a maximum of 36°C (97°F), averaging 27°C (81°F). However, it is significantly wetter, receiving a substantial 201 mm (7.9 in) of rain spread over 23 days, along with high humidity levels reaching 89%. For more details on March weather in Cuiaba, you can visit Cuiaba weather in March.
In comparing the weather between September and April, significant differences are evident. September boasts a warm climate with average temperatures around 29°C (84°F), peaking at a scorching 41°C (106°F), while enjoying only minimal precipitation of 26 mm (1.0 in) over just 5 days, leading to lower humidity levels at 30%. In contrast, April experiences milder temperatures, with averages of 26°C (80°F) and maximums reaching 36°C (97°F). However, it is also considerably wetter, receiving 123 mm (4.8 in) of rainfall over 16 days, resulting in much higher humidity at 87%. For more details on this month's weather, visit Cuiaba weather in April.
In September, the weather is generally hot, with temperatures ranging from a minimum of 12°C (54°F) to a scorching maximum of 41°C (106°F), accompanied by low humidity at 30%. Precipitation is modest at 26 mm (1.0 in) over about 5 days. In contrast, May experiences milder conditions, with temperatures starting from a minimum of 7°C (45°F) and peaking at 34°C (94°F), while averaging 25°C (77°F). May also sees slightly more rainfall at 33 mm (1.3 in) over 6 days and significantly higher humidity at 78%. For more detailed insights, you can check Cuiaba weather in May.
September weather features significantly warmer temperatures compared to June, with average highs reaching up to 29°C (84°F) and maximums hitting 41°C (106°F). In contrast, June offers a milder climate, with averages around 24°C (76°F) and maximum temperatures of 35°C (95°F). Additionally, September experiences more dry days with only 26 mm (1.0 in) of precipitation over five days, while June remains exceptionally dry with just 2 mm (0.1 in) of rain and no recorded rainy days. Humidity levels also differ notably, as June is more humid at 63%, while September maintains a lower humidity of 30%. For more specific details, you can check Cuiaba weather in June.
In comparing the weather between September and July, September experiences significantly higher temperatures, with an average of 29°C (84°F) and a maximum reaching 41°C (106°F). In contrast, July has a cooler average temperature of 24°C (75°F), peaking at 35°C (96°F). Additionally, September sees a slight amount of rainfall, accumulating 26 mm (1.0 in) over five days, while July remains completely dry with zero precipitation. Humidity levels are also contrasting: July has a higher humidity of 50%, compared to September's 30%. For more details on July's climate, check Cuiaba weather in July.
In August, the weather in Cuiabá is generally warm, with a minimum temperature of 11°C (52°F) and an average of 26°C (79°F), reaching a maximum of 39°C (102°F). The month experiences minimal rainfall, only about 12 mm (0.5 in) over just one day, and humidity levels are higher at 39%. In contrast, September sees a noticeable increase in both temperature and precipitation. The minimum temperature is slightly warmer at 12°C (54°F), while the average rises to 29°C (84°F) and the maximum peaks at 41°C (106°F). However, September also brings more rain, totaling 26 mm (1.0 in) over five days, and humidity drops to 30%. This shift highlights a transition from August's drier and more stable conditions to a warmer and wetter September. For more details, you can check Cuiaba weather in August.
September and October exhibit noticeable differences in weather patterns, despite having similar average maximum temperatures. September features a wider temperature range, with nightly lows dipping to 12°C (54°F) and an average high of 29°C (84°F). In contrast, October sees milder nights at 19°C (66°F), while the average temperature remains steady at 28°C (84°F). One of the most significant changes is in precipitation; September experiences only 26 mm (1.0 in) over five days, whereas October sees a substantial increase in rainfall to 106 mm (4.2 in) over 14 days, resulting in a more humid atmosphere. For more detailed insights, check out Cuiaba weather in October.
In September, the weather is characterized by a wide range of temperatures, with minimums reaching 12°C (54°F) and maximums soaring up to 41°C (106°F), resulting in an average of 29°C (84°F). The humidity is relatively low at 30%, and there is minimal precipitation of 26 mm (1.0 in) over just five days. In contrast, November brings warmer temperatures, with minimums starting at 20°C (68°F) and an average of 27°C (82°F), though maximums still reach as high as 39°C (102°F). Precipitation significantly increases to 173 mm (6.8 in) across 21 days, with humidity rising to 62%. For more details, you can explore Cuiaba weather in November.
In September, weather conditions are characterized by high temperatures, with averages around 29°C (84°F) and maximums reaching up to 41°C (106°F). The humidity is relatively low at 30%, and there is minimal precipitation of about 26 mm over just 5 days. In contrast, December brings a dramatic shift as temperatures moderate slightly, averaging 27°C (81°F) with maximums of 36°C (97°F). However, this month sees a significant increase in humidity to 84% and a higher precipitation level of 213 mm spread across 24 days, indicating much wetter conditions. For more specifics on December weather in Cuiabá, you can check Cuiaba weather in December.
As September rolls into Cuiaba, the weather offers a refreshing transition from the dampness of the winter months. With warmer temperatures starting to dominate the landscape, this month sees a notable rise, setting the stage for the hot and dry conditions of the upcoming summer. The average temperature sits comfortably at a balmy 29°C, contrasted by some potential peaks of up to 41°C, giving visitors plenty of sunny days to enjoy outdoor activities. Although the month experiences minimal rainfall, typically only five days of light showers, the humidity remains relatively low at 30%, enhancing the overall comfort level. For a comprehensive understanding of what to expect throughout the year, explore our full guide on Cuiaba Climate.