Last updated: August 21, 2025
In Blumenau, Brazil, September brings a delightful transition into spring, with temperatures ranging from a pleasant minimum of 6°C (44°F) to a maximum of 31°C (87°F). The average temperature hovers around 19°C (66°F), making it a comfortable time to explore the vibrant city. However, expect 115 mm (4.5 in) of rainfall spread over 13 days, contributing to the area’s lush greenery. With humidity levels at 82%, the atmosphere can feel a bit damp, but this charm only adds to the rich beauty of Blumenau in September.
In September, Blumenau experiences a delightful transition as temperatures begin to rise after the cooler winter months. With a minimum of 6°C (44°F) and an average of 19°C (66°F), the city starts to shake off the chill, heralding the arrival of spring. Days gradually warm up, reaching a pleasant maximum of 31°C (87°F), making it a perfect time for outdoor activities and enjoying the vibrant local culture. This month showcases a distinct warming trend, as it bridges the gap between winter's chill and summer's heat, inviting both residents and visitors to embrace the blooming beauty of the season.
In September, Blumenau experiences a notable shift in precipitation patterns as the total rainfall amounts to 115 mm (4.5 in) over 13 days. This marks an increase from the drier months of July and August, where the average precipitation was significantly lower at 48 mm (1.9 in) and 73 mm (2.9 in) respectively. Interestingly, while precipitation begins to rise, it remains moderate compared to the wettest months earlier in the year, such as January with 218 mm (8.6 in). This trend suggests a transitional phase as the region prepares for the heavier rains of October and November, which typically follow this milder September, setting the stage for a vibrant and lush landscape ahead.
In Blumenau, Brazil, September ushers in a slight reprieve from the summer humidity, settling at 82%. This month marks a transition as the humidity begins to drop from the peak levels of August, which recorded a low of 79%, the driest point of the year. As the seasons shift towards the end of the year, humidity levels gradually climb back up, reaching 86% in both November and December. The trend suggests a consistent pattern where winter months experience lower humidity, particularly in July and August, paving the way for the more humid conditions typical of spring and summer in Blumenau.
In September, Blumenau experiences a notable UV Index of 11, placing it in the extreme exposure category, where a mere 10 minutes of sun can lead to burns. This positions September as one of the months with high UV levels, similar to March and just below the intensity seen from January to August. As the year progresses, the UV Index tends to fluctuate, peaking in the summer months, but September stands out with its short burn time, urging residents and visitors alike to take skin protection seriously. For those planning outdoor activities, understanding these trends is crucial for enjoying the sun safely. More details can be found at Blumenau UV Index.
UV Risk Categories
As September arrives in Blumenau, Brazil, the city basks in 226 hours of sunlight, contributing to a vibrant transition into spring. This month, while slightly below the luminous peaks of previous months like February and March with 278 and 282 hours respectively, still maintains a warm and welcoming atmosphere. The sunshine continues the trend of a gradual decline from the higher summer totals of earlier months, reflecting a gentle shift towards the more temperate days of late spring and early summer. November promises a potential resurgence of sunlight with 273 hours, but for now, September's golden rays create a pleasant backdrop for outdoor festivities and gatherings, inviting both locals and visitors to enjoy the charm of Blumenau.
In Blumenau, Brazil, September ushers in the early hints of spring, but the chances of basking in sunny weather are relatively modest at just 20%. This marks a notable dip from the sunnier months of July and May, where opportunities for blue skies soar to 52% and 44% respectively. As the year transitions from winter to spring, the likelihood of sunshine fluctuates significantly, with September trailing behind the more favorable conditions typical of late summer. With only a slim chance of clear skies, visitors may find that planning outdoor activities in September could be a gamble with the clouds.
As September unfolds in Blumenau, Brazil, residents enjoy 11 hours of daylight, a continuation of the trend seen in August. The month marks a subtle transition as daylight begins to increase again, hinting at the approaching longer days of spring. But the pattern of daylight in Blumenau is cyclical; it begins robustly in January with 13 hours, gradually tapering to its shortest days in May, before slowly building back up. This rhythm not only illuminates the changing seasons but also reflects the vibrant lifestyle that flourishes within this picturesque city as it basks in the gentle light of early spring.
In Blumenau, Brazil, the breezy charm of September is unmistakable, as average wind speeds reach 1.9 m/s (4 mph), marking a delightful uptick from the preceding months. This gentle increase reflects a gradual shift in the seasonal patterns, with spring on the horizon. From January to August, winds fluctuated between 1.5 to 1.8 m/s (3 to 4 mph), offering a serene atmosphere perfect for outdoor activities. However, September's arrival brings a hint of vigor, setting the stage for a refreshing October, when winds further strengthen to 2.0 m/s. This evolution in September's breezes invites both locals and visitors to embrace the beauty of the changing seasons, as the refreshing winds dance through the vibrant streets of Blumenau.
Weather in Blumenau varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Blumenau, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather boasts a more moderate temperature range, with minimums of 6°C (44°F) and maximums reaching 31°C (87°F), averaging around 19°C (66°F). This month experiences considerable rainfall, totaling 115 mm (4.5 in) over approximately 13 days, accompanied by a humidity level of 82%. In contrast, January brings more intensity, with minimum temperatures at 16°C (61°F) and maximums soaring to 38°C (101°F), averaging 24°C (76°F). Precipitation is significantly higher in January at 218 mm (8.6 in) over about 20 days, resulting in a slightly elevated humidity of 86%. The stark differences highlight how September presents a more temperate climate compared to the hot and humid conditions of January. For more detailed insights, check Blumenau weather in January.
September and February present distinct contrasts in weather patterns. September typically sees temperatures ranging from a minimum of 6°C (44°F) to a maximum of 31°C (87°F), with an average of 19°C (66°F). The month experiences about 115 mm (4.5 in) of precipitation over 13 days, accompanied by a humidity level of 82%. In contrast, February boasts warmer temperatures with minimums of 12°C (54°F) and maximums reaching up to 36°C (97°F), averaging 24°C (75°F). This month has higher precipitation levels at 186 mm (7.3 in) spread over 19 days, and a similar humidity level of 83%. For those interested in exploring February weather in more detail, visit Blumenau weather in February.
When comparing the weather of September and March, notable differences emerge. September experiences cooler temperatures, with a minimum of 6°C (44°F) and an average of 19°C (66°F), while March boasts a milder minimum of 15°C (59°F) and a higher average of 23°C (74°F). Furthermore, March tends to be wetter, receiving 160 mm (6.3 in) of rainfall over 22 days compared to September's 115 mm (4.5 in) across 13 days. Humidity is also slightly higher in March at 85%, compared to September's 82%. For more details, visit Blumenau weather in March.
September and April offer distinct weather experiences, reflecting the transition of seasons. September sees a wider temperature range, with minimums of 6°C (44°F) and maximums reaching 31°C (87°F), averaging at 19°C (66°F). It also has higher precipitation levels, totaling 115 mm (4.5 in) over 13 wet days, accompanied by a humidity level of 82%. In contrast, April enjoys slightly milder temperatures, starting at a minimum of 8°C (47°F) and peaking at 32°C (91°F), with an average of 21°C (69°F). While April experiences less rainfall at 90 mm (3.6 in) over 14 days, the humidity is fairly high at 85%. For more detailed insights into this month, you can check Blumenau weather in April.
When comparing the weather in September and May, both months exhibit similar temperature ranges, with average highs around 31°C (87°F) in September and 31°C (89°F) in May. The minimum temperatures are also close, with September starting at 6°C (44°F) and May slightly cooler at 5°C (41°F). Precipitation levels are nearly identical, with September receiving 115 mm (4.5 in) and May slightly less at 112 mm (4.4 in), both experiencing rain on approximately 13 days. Humidity is slightly higher in September at 82% compared to 86% in May, making May feel a touch more humid. For a more detailed look at May weather specifics, you can visit Blumenau weather in May.
When comparing the weather in September and June, September experiences slightly warmer temperatures, with an average of 19°C (66°F) compared to June's 17°C (62°F). Both months exhibit comparable maximum temperatures, with September reaching up to 31°C (87°F) and June peaking at 30°C (86°F). Interestingly, the precipitation levels are quite similar, with September receiving 115 mm (4.5 in) over 13 days and June having a slightly higher 117 mm (4.6 in) across 11 days. Humidity remains high in both months, with September at 82% and June at 85%. For more details on June weather, you can check Blumenau weather in June.
In comparing the weather of September and July, September tends to be warmer overall, with average temperatures reaching 19°C (66°F) compared to July's 15°C (60°F). While both months can experience high temperatures, September has a maximum of 31°C (87°F), which is only marginally higher than July's maximum of 30°C (87°F). However, September is notably wetter, receiving 115 mm (4.5 in) of precipitation over 13 days, whereas July has only 48 mm (1.9 in) over 8 days. Humidity levels are similar, with September at 82% and July at 80%, indicating a generally sticky atmosphere in both months. For a more detailed look at July weather specifically, you can visit Blumenau weather in July.
In comparing the weather of September and August, September presents a wider temperature range, with minimums of 6°C (44°F) compared to August's 2°C (36°F), while average temperatures rise to 19°C (66°F) from August's 16°C (61°F). Both months feature similar maximum temperatures, with September reaching up to 31°C (87°F) and August slightly higher at 32°C (89°F). However, September is notably wetter, experiencing 115 mm (4.5 in) of precipitation over 13 days, compared to August's 73 mm (2.9 in) across 10 days. Humidity levels are also slightly elevated in September at 82%, compared to 79% in August. For more specific insights, you can check Blumenau weather in August.
September in Blumenau showcases a transition from the warmth of summer to the cooler embrace of autumn, with temperatures ranging from a chilly 6°C (44°F) at night to a pleasantly warm 31°C (87°F) during the day. However, the month is marked by significant rainfall, with 115 mm (4.5 in) of precipitation spread over 13 days, resulting in humid conditions at 82%.
In contrast, October brings slightly warmer nights with a minimum temperature of 9°C (49°F) and an average high reaching up to 36°C (96°F). The month experiences increased rainfall, totaling 154 mm (6.1 in) over 19 days, yet the humidity remains consistent at 82%. This makes October a month of both warmth and frequent showers, as you can find out more in detail through this link: Blumenau weather in October.
In September, the weather features a minimum temperature of 6°C (44°F) and an average temperature of 19°C (66°F), peaking at a maximum of 31°C (87°F). There is considerable rainfall, totaling 115 mm (4.5 in), spread over 13 days, and the humidity is relatively high at 82%. In contrast, November experiences warmer conditions, with a minimum temperature of 10°C (50°F) and an average of 21°C (70°F), reaching up to 35°C (95°F). However, it also sees increased precipitation totaling 137 mm (5.4 in) over 20 days, with humidity rising slightly to 86%. This shift highlights the transition from the milder early fall weather of September to the warmer, wetter late spring conditions typical of November. For more details, check out Blumenau weather in November.
September and December in Blumenau exhibit notable differences in weather patterns. September experiences a more moderate temperature range, with a minimum of 6°C (44°F) and an average of 19°C (66°F), while December brings a warmer climate, reaching a minimum of 12°C (54°F) and an average of 23°C (73°F), peaking at a maximum of 36°C (97°F). Additionally, December not only introduces higher temperatures but also increased precipitation, with 192 mm (7.6 in) falling over 21 days compared to September's 115 mm (4.5 in) across 13 days. The humidity also rises slightly, averaging 88% in December, compared to 82% in September. For more details on what to expect, check out Blumenau weather in December.
As September rolls into Blumenau, the weather begins to transition, often marked by a blend of warm days and cool nights. While the maximum temperatures can soar to a pleasant warmth, the average chill serves as a reminder that winter is fading away. This month also sees a noticeable uptick in rainfall, with rainy days more frequent than in the preceding months, contributing to the lush greenery for which Blumenau is known. With humidity levels hovering around a high 82%, it’s a time when the air feels heavy yet invigorating, inviting both locals and visitors to embrace the unique charm of early spring. To delve deeper into what makes Blumenau's climate distinct, explore more at Blumenau Climate.