Last updated: August 21, 2025
In September, the vibrant city of Curitiba, Brazil, experiences a delightful transition into spring, with temperatures ranging from a cool minimum of 6°C (42°F) to a warm maximum of 31°C (88°F). The average temperature settles comfortably at 17°C (63°F), making it a pleasant time for outdoor activities. While the month sees 81 mm (3.2 in) of precipitation over about 8 days, the humidity level hovers around 73%, adding a refreshing feel to the air. Embrace the charm of this dynamic season as nature awakens and colors blossom in the stunning landscapes of Curitiba!
As September rolls into Curitiba, Brazil, the city begins to shake off the chill of winter, welcoming temperatures that range from a minimum of 6°C (42°F) to a maximum of 31°C (88°F). The average temperature sits comfortably at 17°C (63°F), illustrating a gradual shift toward warmer days. This month acts as a transition, marked by a significant increase in warmth compared to the colder depths of July and August, which saw sub-zero nights and mild days. As spring approaches, locals can enjoy the pleasant mix of cooler mornings and balmy afternoons, encouraging outdoor activities and the blossoming of vibrant local flora. September not only signals a change in temperature but also heralds the refreshing essence of new beginnings in the charming city of Curitiba.
September in Curitiba experiences a modest precipitation total of 81 mm (3.2 in) over 8 days, continuing the trend of drier conditions following the wetter winter months. This slight increase from August's 78 mm showcases the transition toward the more humid spring season, yet it remains significantly lower than the earlier months of the year. The rainfall pattern indicates a gradual return to more frequent showers, as the city prepares for October's heavier downpours, typically surpassing 150 mm. Overall, September serves as a key pivot point, with precipitation marking an increase in frequency and volume leading into the wetter fall months.
In September, Curitiba, Brazil, experiences a steady humidity level of 73%, mirroring the slight dip seen in August. This marks a notable decrease from the summer months, where humidity levels hover around 86% to 89%. As the city transitions into spring, the trend indicates a gradual decline in humidity, reaching its lowest in October at 71%. This seasonal shift not only fosters a more comfortable atmosphere but also sets the stage for the increased moisture levels that return in the later months of the year, peaking again in November and December. Overall, September serves as a pivotal point in Curitiba's climatic cycle, introducing refreshing lower humidity levels before the wet season resumes.
As September arrives in Curitiba, Brazil, residents and visitors should remain vigilant about sun protection, as the UV Index is projected at 11, classifying it as extreme. This marks a return to higher levels of UV exposure after a slight dip in July and June where the values reached 6. Notably, the burn time remains a swift 10 minutes, emphasizing the importance of protective measures during outdoor activities. With such consistent UV intensity across the seasons—where January through April continues to show extreme levels—it’s crucial to stay informed and proactive about skin safety. For more details, check out the Curitiba UV Index.
UV Risk Categories
As September unfolds in Curitiba, Brazil, residents bask in the warm embrace of the sun, enjoying approximately 247 hours of sunshine. While this marks a slight decline from the sun-soaked 283 hours of March, it still offers a refreshing respite after the winter months, characterized by a dip to just 211 hours in June. This transitional period hints at the vibrant spring ahead, where sunshine starts to gain momentum again, culminating in the radiant warmth of December with an impressive 300 hours. Curitiba's September sunshine not only enriches the atmosphere but also sets the stage for a lively and blossoming season.
In Curitiba, Brazil, the likelihood of sunny weather in September stands at 25%, making it a month that straddles the transition from the cold winter to the warmer spring. This figure reflects a slight dip compared to the sunnier months of July and May, which boast chances of 48% and 37%, respectively. As the preceding months yield a mix of milder sun exposure, September continues this trend of fluctuating sunshine, presenting an opportunity for pleasant afternoons. However, if you're dreaming of uninterrupted sunshine, you might want to wait until later in the year when the odds improve, especially as October and November see even lower probabilities. Thus, while September offers a reasonable chance for sunny spells, weather enthusiasts may find the clarity they seek in the more favorable months ahead.
As September rolls into Curitiba, Brazil, the city enjoys 11 hours of daylight, a continuation of the gradual transition from winter to spring. This month marks the end of the darker winter months, where daylight hovered around 10 hours in June, July, and August. Following September, daylight begins to increase again, reaching up to 12 hours in October and culminating in the longer days of summer, where residents can bask in up to 13 hours of sun by December. The progression from around 10 hours to 11 hours in September signals a welcome return to brighter days, invigorating the landscape and uplifting the spirits of its inhabitants as they look forward to the sunnier months ahead.
In September, Curitiba experiences a refreshing shift in its wind patterns, as the average wind speed settles at 3.0 m/s (7 mph), matching the gentle breezes of August. This month marks a subtle uptick from the quieter months of late winter, where wind speeds hovered around 2.6 to 2.7 m/s (6 mph). As spring approaches, the city begins to feel the invigorating effects of increased airflow, hinting at the lively transformations of nature ahead. Following September, the wind picks up slightly, with October showing an increase to 3.3 m/s (7 mph). Overall, this transitional month serves as a gentle reminder of the changing seasons, inviting residents and visitors alike to enjoy the crisp air and the beauty of the blooming city.
Weather in Curitiba varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Curitiba, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Curitiba begins to transition into warmer temperatures, with averages around 17°C (63°F) and maximums reaching up to 31°C (88°F). However, it also experiences considerable rainfall, with about 81 mm (3.2 in) over approximately 8 days, and humidity levels around 73%. In contrast, January brings hotter and more humid conditions, featuring a minimum temperature of 13°C (56°F) and averaging 21°C (70°F), climbing to a peak of 33°C (91°F). This month sees increased precipitation, totaling 167 mm (6.6 in) over 21 days, making it the wetter month compared to September, with a higher humidity level of 89%. For more detailed insights on the weather conditions in January, you can check out Curitiba weather in January.
September and February present distinct weather patterns. In September, temperatures range from a minimum of 6°C (42°F) to a maximum of 31°C (88°F), with an average of 17°C (63°F). This month sees about 81 mm (3.2 in) of precipitation over approximately 8 days, resulting in a humidity level of 73%. In contrast, February is warmer with minimum temperatures around 11°C (51°F) and maximums reaching 32°C (90°F), averaging 21°C (69°F). February experiences significantly higher rainfall, with 137 mm (5.4 in) falling over 19 days, and humidity rises to 86%. For a more detailed look at February's weather, visit Curitiba weather in February.
September and March present distinct weather profiles, showcasing the transition from late winter to early spring in September, and the early arrival of autumn in March. September features a broader temperature range, with minimums dipping to 6°C (42°F) and maximums reaching up to 31°C (88°F), alongside an average temperature of 17°C (63°F). In contrast, March starts off warmer, with minimums at 12°C (54°F) and an average of 20°C (69°F), while still peaking at 31°C (87°F). Rainfall is also more pronounced in March, with a total of 118 mm (4.7 in) over 22 days compared to September's 81 mm (3.2 in) over just 8 days. Additionally, March holds a higher humidity level of 87%, compared to September’s 73%. For more detailed information, check out Curitiba weather in March.
In September, the weather tends to showcase a broader temperature range, with minimums of 6°C (42°F), average highs of 17°C (63°F), and maximums reaching up to 31°C (88°F). However, one can expect an average of 81 mm (3.2 in) of precipitation over about 8 days, coupled with a humidity level of 73%. In contrast, April provides slightly warmer conditions, maintaining a minimum of 6°C (42°F) and averaging 18°C (64°F), with maximum temperatures peaking at 28°C (83°F). The month is characterized by lower precipitation at 67 mm (2.6 in) across about 11 days and higher humidity levels of 85%. For a closer look at April's climate specifics, visit Curitiba weather in April.
In comparing the weather of September and May, September typically displays a broader temperature range, with a minimum of 6°C (42°F), an average of 17°C (63°F), and a maximum of 31°C (88°F). In contrast, May is slightly cooler, starting from a minimum of 2°C (36°F), averaging 16°C (60°F), and peaking at 28°C (82°F). Both months experience substantial precipitation, with September receiving 81 mm (3.2 in) over approximately 8 days, while May sees slightly more at 89 mm (3.5 in) over 10 days. Humidity levels are higher in May at 84%, compared to September's 73%. For more detailed information, you can visit Curitiba weather in May.
When comparing the weather in September and June, September generally offers warmer temperatures, with a minimum of 6°C, an average of 17°C, and a maximum of 31°C, while June's temperatures range from a minimum of 1°C to a maximum of 26°C. September experiences slightly less precipitation, totaling 81 mm over 8 days, compared to June's 99 mm spread across 10 days. Additionally, September's humidity is slightly lower at 73%, compared to June's 83%, contributing to a more comfortable feel during the late spring and early summer transition. For more detailed information, visit Curitiba weather in June.
September and July exhibit notable differences in weather patterns. September boasts a wider temperature range, with minimums of 6°C (42°F) and maximums hitting 31°C (88°F), averaging at 17°C (63°F). In contrast, July’s temperature is cooler, featuring a minimum of -3°C (27°F) and a maximum of 26°C (79°F), with an average of 14°C (57°F). Additionally, September experiences more rainfall, with 81 mm (3.2 in) over 8 days, while July has less precipitation at 33 mm (1.3 in) over just 5 days. Humidity levels are slightly higher in July at 78%, compared to 73% in September. For a detailed look at the July weather, check out Curitiba weather in July.
In comparing the weather between September and August, we see a noticeable increase in temperature. September features a minimum of 6°C (42°F) and averages around 17°C (63°F), rising to a maximum of 31°C (88°F), while August has a lower range with a minimum of 1°C (33°F) and an average of 14°C (58°F), peaking at 29°C (85°F). Both months experience similar levels of precipitation, with September receiving 81 mm (3.2 in) over 8 days and August slightly less at 78 mm (3.1 in) over 7 days. Interestingly, the humidity remains constant at 73% in both months, contributing to a similar feel in terms of moisture in the air. For more details on August weather, you can check out Curitiba weather in August.
In September, the weather exhibits a wide temperature range, with minimums dipping to 6°C (42°F) and daytime highs averaging around 17°C (63°F), reaching as high as 31°C (88°F). This month experiences about 81 mm (3.2 inches) of rainfall over 8 days, leading to a relatively humid atmosphere at 73%. In contrast, October sees slightly warmer temperatures, with minimums at 8°C (46°F), an average of 18°C (64°F), and maximums peaking at 33°C (92°F). However, October has a significantly higher precipitation level of 153 mm (6.0 inches) spread across 16 days, resulting in just a touch lower humidity at 71%. For more detailed insights into October’s weather, check out Curitiba weather in October.
September and November exhibit some notable differences in weather patterns. In September, temperatures range from a minimum of 6°C to a maximum of 31°C, with an average of 17°C. The month experiences about 81 mm of precipitation over 8 days, and humidity levels are around 73%. In contrast, November sees a slight increase in minimum temperature to 8°C and maintains the same maximum of 31°C, with an average temperature of 18°C. However, it also brings higher precipitation at 107 mm over 17 days and a rise in humidity to 83%. Overall, November tends to be wetter and more humid compared to September, making it important to prepare for the changing conditions. For more insights, check out Curitiba weather in November.
In comparing the weather between September and December, we observe notable differences in temperature and precipitation. September experiences a wider range of temperatures, with a minimum of 6°C (42°F) and a maximum reaching up to 31°C (88°F), while December has a slightly higher minimum temperature of 11°C (51°F) and averages 20°C (68°F) with a peak of 31°C (89°F). Additionally, December tends to be wetter, receiving 158 mm (6.2 in) of precipitation over 21 days, compared to September's 81 mm (3.2 in) over just 8 days. Humidity levels also rise in December, averaging 87% compared to September's 73%. For more details, visit Curitiba weather in December.
As September rolls into Curitiba, visitors can experience a refreshing transition from the winter chill to the warmer embrace of spring. With maximum temperatures often reaching 31°C (88°F), the city becomes increasingly vibrant, yet it maintains an average coolness at 17°C (63°F), allowing for comfortable outdoor exploration. Rainfall begins to frequent the landscape, with nearly 81 mm accumulated over 8 days, making the air notably more humid at 73%. This month sets itself apart from the drier winter months by showcasing a blooming balance of warmth and rain, perfect for enjoying the lush greenery that defines the region. For more detailed insights, visit Curitiba Climate.