Last updated: August 21, 2025
September in Caxias do Sul, Brazil, offers a striking contrast in temperatures, with highs reaching 33°C (92°F) and lows dipping to a chilly 0°C (31°F). The average daily temperature sits comfortably at 17°C (62°F), creating a mild climate that many find enjoyable. However, this month also brings 177 mm (7.0 in) of rainfall over 12 days, contributing to an 80% humidity level that can make the air feel quite moist. Whether you’re exploring outdoor activities or cozying up indoors, September’s varied weather provides a unique backdrop for your adventures in this vibrant Brazilian city.
As September rolls in Caxias do Sul, temperatures begin to rise from the chilly winter months, creating a refreshing transition into spring. With a minimum of 0°C (31°F), mornings can be quite crisp, but as the day unfolds, the average temperature climbs to a pleasant 17°C (62°F), allowing for comfortable outdoor activities. The maximum reaches 33°C (92°F), hinting at the warmth of the upcoming summer. This month notably marks a significant shift, as temperatures reflect a gradual upward trend from the winter lows of previous months, setting the stage for vibrant springtime blooms and lively experiences in this charming Brazilian city.
September brings a notable uptick in rainfall to Caxias do Sul, with precipitation reaching 177 mm (7.0 in) over 12 days. This month's totals not only surpass those of August but also highlight a trend of increasing rainfall as the year progresses; it follows a drier winter, where August recorded just 90 mm (3.5 in). The consistent pattern of wet weather in September sets the stage for a lush transition into spring, making it one of the wetter months of the year. As the valleys and hills come alive with vibrant greenery, the community eagerly anticipates the rejuvenation that this rainfall promises for the surrounding landscape.
In Caxias do Sul, Brazil, September brings a notable shift in humidity, settling at 80%. This reflects a slight rebound from the drier conditions of August, which recorded a lower 77%. As the seasons change, the humidity levels begin to steadily rise, hinting at the more humid months that lie ahead. May stands out as the peak of humidity, reaching 88%, while October follows closely with 84%. Overall, the trend showcases a general increase in humidity as the year progresses, signaling the transition from the drier winter months into a more humid spring.
In September, Caxias do Sul experiences a UV Index of 10, categorized as very high, which means that sun exposure can lead to skin damage in just 15 minutes. As the seasons shift, this month marks a transition from the intense UV levels of winter months, where indices reached 5 in both June and July, to a more potent sun that approaches the extremes seen at the year's beginning. With UV indices peaking at 15 from January through March, it's crucial to stay vigilant even as the values moderate. As September approaches, outdoor enthusiasts should prepare accordingly to protect their skin while enjoying the pleasant early spring weather. For more details on UV levels throughout the year, check out the Caxias do Sul UV Index.
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In September, Caxias do Sul basks in approximately 240 hours of sunshine, offering a pleasant transition into the warmer months. This reflects a moderate drop from the sunnier months of January through March, which boast over 260 hours of radiant light. While September delivers fewer sunlit hours than the peak summer months, it still holds its own before the sun begins to shine more brightly again in October and November, the latter of which reaches an impressive 315 hours. As the year progresses, the trend of increasing daylight culminates in December, when the region experiences the year’s peak at 362 hours. With each month, Caxias do Sul experiences a delightful ebb and flow of sunshine that highlights the beauty of its changing seasons.
In Caxias do Sul, September ushers in the transition of seasons, bringing a notably lower chance of sunny weather at 31%. This trend marks a dip from the sunnier months of July and February, where the likelihood of sunny days peaks at 61% and 57%, respectively. As we move from the vibrant sunshine of winter and late summer into spring, the chance of sun continues to fluctuate, with October and November showing slight improvements, landing at 44% and 51%. Ultimately, September stands out as a transitional month where the sun's presence is less certain, hinting at the gradual shift to more temperate fall conditions.
As September unfolds in Caxias do Sul, daylight begins to reclaim its presence, offering approximately 11 hours of sunlight—a slight increase compared to the 10 hours typical of the winter months. This transition signals the gradual return of longer days, bridging the seasonal gap towards the vibrant days of spring. Following a progression from the shorter day cycles of winter, where June, July, and August provide just 10 hours, September marks a refreshing shift. In the ensuing months, daylight will continue to extend, culminating in the longer hours of December and January, where the sun generously bathes the region in a total of 13 hours. Thus, September stands as a pivotal moment, heralding the approach of brighter days and the vibrant energy that comes with them.
September in Caxias do Sul brings a steady average wind speed of 2.5 m/s (6 mph), mirroring the gentle breezes of the previous months. As the cool air of early spring starts to settle in, the winds maintain a pleasant consistency, neither too forceful nor overly calm. This trend of stable winds is notable, especially as Caxias transitions from the winter months, where the speeds gradually increased. It’s a perfect time for locals to enjoy outdoor activities, embracing the refreshing atmosphere that September’s winds usher in. As the season shifts, these breezes promise to enhance the vibrant landscape, setting the stage for the blossoming beauty of spring.
Weather in Caxias do Sul varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Caxias do Sul, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, September tends to present a wider range of temperatures, with minimums dropping to 0°C (31°F) and maximums reaching up to 33°C (92°F). The average temperature sits at 17°C (62°F), accompanied by significant precipitation of 177 mm (7.0 in) over approximately 12 days. In contrast, January enjoys milder temperatures with a minimum of 9°C (49°F) and maximums peaking at 36°C (97°F), averaging around 22°C (73°F). Although January has slightly less precipitation at 169 mm (6.6 in) over 15 days, the humidity remains consistent at 80% for both months. For more detailed information on January weather, check Caxias do Sul weather in January.
In comparing the weather of September and February, it's clear that both months experience similar temperature ranges, with maximums reaching up to 33°C (92°F). However, September starts cooler, with minimum temperatures dropping to 0°C (31°F), while February has a milder minimum of 10°C (50°F). September sees an average temperature of 17°C (62°F) compared to February's 21°C (71°F). Rainfall is more abundant in September, with 177 mm (7.0 in) over 12 days, whereas February experiences slightly less precipitation at 161 mm (6.3 in) over 14 days. Humidity also differs slightly, with September at 80% and February at 77%. For more specifics on February weather, you can view Caxias do Sul weather in February.
In comparing the weather of September and March, September tends to have a wider temperature range, with minimums dipping to 0°C (31°F) and maximums reaching up to 33°C (92°F), leading to an average of 17°C (62°F). In contrast, March showcases a milder climate, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 34°C (94°F), averaging at 20°C (69°F). Precipitation is more pronounced in September, accumulating 177 mm (7.0 in) over 12 days, compared to March's 131 mm (5.2 in) over 13 days. Both months experience high humidity, with September at 80% and March slightly lower at 79%. For more details about March weather specifically, you can check Caxias do Sul weather in March.
When comparing the weather in September and April, we observe notable differences in both temperature and precipitation patterns. September tends to start cooler, with minimum temperatures dipping to 0°C (31°F) and maximums reaching up to 33°C (92°F), while April has a milder temperature range, with minimums around 4°C (39°F) and maximums peaking at 30°C (87°F). In terms of precipitation, September is significantly wetter, receiving 177 mm (7.0 inches) over 12 days, compared to April's 99 mm (3.9 inches) over 10 days. Humidity levels remain comparable, with September at 80% and April slightly higher at 83%. For more detailed insights, you can check Caxias do Sul weather in April.
When comparing the weather in September and May, September typically offers a wider temperature range, with minimums dropping to around 0°C (31°F) and maximums reaching up to 33°C (92°F), while May's temperatures are slightly milder, ranging from a minimum of 1°C (33°F) to a maximum of 29°C (84°F). Despite similar levels of precipitation, with both months experiencing about 177 mm (7.0 in) in September and 175 mm (6.9 in) in May, September's humidity levels average around 80%, compared to May's higher average of 88%. For more detailed insights into May weather specifically, you can check Caxias do Sul weather in May.
In comparing the weather patterns of September and June, it’s notable that September experiences a broader temperature range, with minimums reaching 0°C (31°F) and maximums soaring to 33°C (92°F), averaging around 17°C (62°F). In contrast, June tends to be slightly cooler, featuring a minimum temperature of -2°C (29°F) and a maximum of 29°C (84°F), with an average of 14°C (57°F).
Precipitation levels are higher in September, with 177 mm (7.0 in) over 12 days, while June has 135 mm (5.3 in) spread across 11 days. Humidity levels are relatively similar, with September at 80% and June slightly higher at 86%. For a more detailed look at June's weather, you can check Caxias do Sul weather in June.
When comparing the weather in September to that of July, there are notable differences in temperature and precipitation. September experiences a wider temperature range, with a minimum of 0°C (31°F) and a maximum of 33°C (92°F), leading to an average of 17°C (62°F). In contrast, July's temperatures are generally cooler, ranging from a minimum of -3°C (27°F) to a maximum of 28°C (83°F) and averaging 13°C (55°F). Additionally, September sees more precipitation, totaling 177 mm (7.0 in) over 12 days, compared to July's 139 mm (5.5 in) over 9 days. The humidity levels remain quite similar, with September at 80% and July slightly higher at 82%. For a detailed look at July weather in Caxias do Sul, visit Caxias do Sul weather in July.
In comparing the weather of September and August, September demonstrates a broader temperature range with a minimum of 0°C (31°F) and a maximum of 33°C (92°F), while August features slightly cooler temperatures with a minimum of -2°C (28°F) and a maximum of 31°C (89°F). September also experiences higher average temperatures, peaking at 17°C (62°F) compared to August's average of 14°C (58°F). Additionally, September sees significantly more precipitation, totaling 177 mm (7.0 in) over 12 days, contrasting with August's 90 mm (3.5 in) across just 8 days. Humidity levels are fairly similar, with September at 80% and August at 77%. For more detailed information, you can check Caxias do Sul weather in August.
September and October display notable similarities and differences in weather patterns. In September, temperatures range from a chilly minimum of 0°C (31°F) to a warm maximum of 33°C (92°F), with an average of 17°C (62°F). This month experiences about 177 mm (7.0 in) of precipitation over 12 days, accompanied by high humidity levels of 80%. In contrast, October welcomes slightly warmer temperatures, with a minimum of 6°C (42°F), an average of 18°C (65°F), and a maximum reaching 35°C (95°F). Precipitation decreases slightly to 161 mm (6.4 in), but rain is forecasted on 14 days, and humidity increases to 84%. For more detailed information on October weather, you can check this link: Caxias do Sul weather in October.
In September, the weather shows a wider temperature range, with a minimum of 0°C (31°F) and a maximum of 33°C (92°F), while November offers a milder minimum temperature of 7°C (44°F) and the same maximum of 33°C (92°F). Both months experience about 177 mm (7.0 in) of precipitation in September and 150 mm (5.9 in) in November, though both have precipitation on approximately 12 days. Humidity is slightly higher in November at 83% compared to September's 80%, creating a more humid atmosphere as the year progresses. For more detailed information on November's weather, check out Caxias do Sul weather in November.
When comparing the weather in September and December, several notable differences stand out. September experiences a broader range of temperatures, with a minimum of 0°C (31°F) and a maximum of 33°C (92°F), while December is generally warmer, featuring minimum temperatures around 6°C (42°F) and a maximum of 35°C (95°F). Precipitation is higher in September, totaling 177 mm (7.0 in), compared to December’s 111 mm (4.4 in), although both months experience a similar number of rainy days. Humidity levels are slightly elevated in December at 87% compared to September's 80%. For more detailed insights about December weather, you can check Caxias do Sul weather in December.
As September rolls in, Caxias do Sul transitions from the cooler embrace of winter to the warmth of spring, marked by a notable rise in temperatures and humidity levels. With daily averages hovering around a pleasant 17°C, the city experiences an inviting mix of warm days and cool nights. However, the month also brings about its fair share of rain, with approximately 177 mm falling over 12 days, contributing to the lush landscapes characteristic of this region. Compared to the preceding months, September is a vibrant time when the air is not only warmer but also rich in moisture, creating an invigorating atmosphere. For a more detailed look at how September aligns with the overall climate patterns, check out Caxias do Sul Climate.