Last updated: August 21, 2025
September in Santa Cruz do Sul, Brazil is a month of transition, characterized by a dynamic range of temperatures and humidity levels. The maximum temperature can soar up to 34°C (94°F), while the average hovers at a comfortable 18°C (64°F), providing a pleasant climate for outdoor activities. However, the nights can be brisk, dipping down to a chilly 5°C (41°F). This month also sees significant precipitation, with about 154 mm (6.1 in) of rain falling over 11 days, leading to a humidity level that averages around 74%. Embrace the vibrant weather patterns of September as you explore the lush landscapes of this charming Brazilian city.
In September, Santa Cruz do Sul experiences a delightful transition as temperatures begin to cool from the intense summer heat. With minimums around 5°C (41°F), the month marks a refreshing dawn that gently leads to an average of 18°C (64°F), perfect for those seeking milder weather. The maximum temperatures can still soar to 34°C (94°F), reminding us that summer is not quite finished. This combination creates a pleasant climate, ideal for outdoor activities while the region sheds the last remnants of its colder winter months, ultimately paving the way for the warmer embrace of spring as the temperatures gradually rise again in October.
September marks a significant shift in precipitation patterns for Santa Cruz do Sul, Brazil, as it experiences an impressive total of 154 mm (6.1 in) of rainfall over 11 days. This surge represents one of the highest monthly totals of the year, following a drier August with only 86 mm (3.4 in). The transition from winter to spring brings lush greenery and revitalizes the landscape, setting the stage for the heavier rains that October typically brings. Interestingly, while May records the most rainfall at 174 mm (6.9 in), September serves as a prime reminder of the approaching wet season, laying the groundwork for the seasonal patterns that define this region's climate.
In September, Santa Cruz do Sul experiences a humidity level of 74%, a slight increase from the drier month of August at 71%. This month marks the transition from the cooler, less humid winter months into the warmer spring season, with humidity gradually building as the year progresses. Notably, after reaching its peak in May at 87%, the humidity begins to stabilize, hovering between the mid-seventies and low-eighties for the remainder of the year. This trend suggests a consistent return to more humid conditions as the region approaches the warmer and wetter months ahead. The fluctuations in humidity reflect the dynamic climate of Santa Cruz do Sul, where humid air becomes a defining feature of the changing seasons.
In September, Santa Cruz do Sul experiences a UV Index of 9, placing it in the very high exposure category with a burn time of just 15 minutes. This month marks a transition from the harsher summer months, yet caution is still paramount as the sun remains strong. As temperatures begin to cool slightly in the lead-up to October, the UV levels highlight the importance of sun safety practices, especially as the following months escalate back into the extreme category with indices reaching 12 and beyond. For more detailed information on UV levels throughout the year, visit Santa Cruz do Sul UV Index.
UV Risk Categories
As September graces Santa Cruz do Sul, Brazil, the sun shines for 224 hours, reflecting the transition into spring. The month follows a series of sunny days that peaked in the late summer, with January basking in 263 hours of sunshine and November boasting a remarkable 310 hours. September's hours may appear diminished compared to the vibrant months of February and March, which enjoyed over 300 hours, yet it still holds a charm of its own. This gradual decline in sunlight from the summer swells hints at the coming warmth of October and the hot summer months ahead, inviting residents and visitors alike to savor the refreshing ambiance before the sun's return to its zenith.
In Santa Cruz do Sul, the likelihood of sunny weather in September drops to a modest 29%, marking it as one of the cloudier months of the year. This trend is particularly notable when compared to the sunnier streak of the preceding months, like July with 62% sunshine and August at 42%. As the seasons transition, September's weather often teeters into the cooler, overcast realms, suggesting that if you're planning a visit, it's prudent to prepare for the possibility of cloudy skies. The month does offer a clear departure from the sunnier summer months while hinting at a gradual return to brighter days in October, which sees a resurgence to 50% sunny prospects.
In Santa Cruz do Sul, Brazil, September brings a delightful transition in daylight duration, offering about 11 hours of sunlight each day. As the seasons shift, this month stands out as a continuation of the gradual decline in daylight that began in March. The daylight hours begin to increase again as we head towards October, with a promising return to 12 hours of sunshine. This pattern reveals the region's rhythm of light, where longer days are embraced as summer approaches, creating an inviting atmosphere for outdoor activities and vibrant community life. The steady progression from 10 to 14 hours of daylight throughout the year showcases Brazil's diverse climate, allowing residents and visitors to enjoy the richness of the seasons.
As September rolls in, Santa Cruz do Sul experiences a gentle increase in wind speed, averaging 2.8 m/s (6 mph), slightly above the summer months. This refreshing breeze heralds the transition into spring, bringing a sense of vitality to the landscape. Interestingly, the wind tends to pick up as the year progresses, with October also seeing a stable speed of 2.6 m/s (6 mph), while the wind becomes more dynamic in the following months, peaking at 3.1 m/s (7 mph) by December. This gradual uptick in wind strength not only enhances the region's scenic beauty but also invigorates outdoor activities, inviting locals and visitors alike to embrace the changing seasons.
Weather in Santa Cruz do Sul varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Cruz do Sul, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January display contrasting weather patterns in Santa Cruz do Sul. In September, temperatures range from a cool 5°C (41°F) to a warm 34°C (94°F), with an average of 18°C (64°F) and significant precipitation of 154 mm (6.1 in) over 11 days. The weather remains humid, with humidity levels at 74%. In comparison, January experiences milder temperatures, with minimums at 12°C (54°F) and maximums peaking at 39°C (103°F), resulting in a higher average of 25°C (77°F) while recording slightly less precipitation at 120 mm (4.7 in) over 13 days. The humidity remains consistent at 74%. For more detailed insights, you can check Santa Cruz do Sul weather in January.
When comparing the weather in September and February, notable differences emerge. September experiences a wider temperature range, with minimums of 5°C (41°F) and maximums reaching up to 34°C (94°F), yielding an average of 18°C (64°F). In contrast, February features warmer conditions, with minimum temperatures starting at 11°C (52°F) and maximums soaring to 37°C (99°F), averaging 24°C (76°F). While both months receive precipitation on about 11 days, September sees significantly higher rainfall at 154 mm (6.1 in), compared to February's 94 mm (3.7 in), resulting in slightly lower humidity in February at 73% versus September's 74%. For more details on February weather in Santa Cruz do Sul, you can check Santa Cruz do Sul weather in February.
When comparing the weather in September and March, notable differences emerge in temperature and precipitation patterns. September tends to be cooler, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 34°C (94°F) and around 154 mm (6.1 in) of precipitation over 11 days, leading to a humidity level of 74%. In contrast, March is warmer, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 38°C (101°F), coupled with lower precipitation at 110 mm (4.3 in) over just 9 days and a slightly lower humidity of 73%. For a detailed look at weather conditions during March, you can explore Santa Cruz do Sul weather in March.
When comparing the weather in September and April, both months showcase a wide temperature range with maximums peaking at 34°C (94°F). However, September generally experiences slightly cooler mornings and afternoons, with minimum temperatures dropping to 5°C (41°F) compared to April's milder 7°C (45°F). Precipitation levels also differ, with September receiving 154 mm (6.1 in) over 11 days, while April has a more manageable 82 mm (3.2 in) over 9 days. Humidity is slightly higher in April at 81%, compared to 74% in September. For more details on the weather specifics in April, you can explore Santa Cruz do Sul weather in April.
When comparing the weather in September and May, September tends to have slightly warmer temperatures, with an average of 18°C (64°F) compared to May's average of 16°C (62°F). Both months experience considerable precipitation, with May receiving 174 mm (6.9 in) over 12 days, slightly higher than September's 154 mm (6.1 in) over 11 days. Additionally, May has higher humidity levels at 87%, compared to September's 74%. For those interested in a deeper dive into May conditions, you can check out Santa Cruz do Sul weather in May.
September's weather exhibits a wider temperature range compared to June, with minimums reaching 5°C (41°F) and maximums soaring to 34°C (94°F), while June's temperatures fluctuate between 0°C (32°F) and 30°C (87°F). Although September tends to be warmer with an average of 18°C (64°F) compared to June's 15°C (59°F), it also sees a higher level of precipitation at 154 mm (6.1 in) over 11 days, in contrast to June's 117 mm (4.6 in) over 9 days. Humidity levels are slightly lower in September at 74%, whereas June experiences higher humidity at 84%, contributing to a more humid feel during the early winter month. For more detailed insights on the June weather, you can visit Santa Cruz do Sul weather in June.
When comparing the weather in September to that of July, September tends to be warmer overall, with an average temperature of 18°C (64°F) compared to July's average of 14°C (57°F). September also sees a broader temperature range, with maximums reaching up to 34°C (94°F), whereas July peaks at 31°C (87°F). In terms of precipitation, September experiences slightly higher rainfall at 154 mm (6.1 in) over 11 days, compared to July's 115 mm (4.5 in) over 10 days. Additionally, September has a humidity level of 74%, which is marginally lower than July's 80%. For a closer look at the July weather specifics, you can visit Santa Cruz do Sul weather in July.
In comparing the weather of September and August, September experiences a wider temperature range, with minimums of 5°C (41°F) compared to August's 0°C (32°F), and an average temperature of 18°C (64°F), slightly warmer than August's average of 15°C (60°F). Both months can reach the same maximum of 34°C (94°F), but September is also marked by significantly higher precipitation, totaling 154 mm (6.1 in) over 11 days, whereas August sees only 86 mm (3.4 in) over 9 days. Additionally, September tends to be a bit more humid, with levels at 74% compared to 71% in August. For more detailed insights, check out Santa Cruz do Sul weather in August.
As September transitions into October, the weather experiences a noticeable shift. September's temperatures range from a cooler minimum of 5°C (41°F) to a warm maximum of 34°C (94°F), with an average of 18°C (64°F). In contrast, October sees slightly milder minimum temperatures at 8°C (46°F) and a higher maximum of 38°C (100°F), resulting in an average increase to 19°C (67°F). Alongside this temperature rise, precipitation levels also increase, with October recording 170 mm (6.7 in) compared to September's 154 mm (6.1 in), and a slight uptick in the number of rainy days from 11 to 13. Humidity also rises marginally from 74% in September to 77% in October, contributing to a more humid feel. For more details, check out Santa Cruz do Sul weather in October.
September and November present notably different weather patterns. In September, temperatures range from a minimum of 5°C (41°F) to an average of 18°C (64°F), peaking at 34°C (94°F). The month sees 154 mm (6.1 in) of precipitation over 11 days, accompanied by a humidity level of 74%. In contrast, November experiences milder temperatures, with a minimum of 10°C (50°F) and an average of 21°C (71°F), reaching a maximum of 38°C (100°F). Precipitation decreases to 124 mm (4.9 in) over 10 days, and humidity rises slightly to 77%. For a closer look at the weather specifics in November, you can visit Santa Cruz do Sul weather in November.
In September, the weather in Santa Cruz do Sul is characterized by a wide temperature range, with minimums around 5°C (41°F) and maximums reaching up to 34°C (94°F). The average temperature hovers around 18°C (64°F), accompanied by relatively high humidity at 74% and significant precipitation totaling 154 mm (6.1 in) over approximately 11 days. In contrast, December brings warmer temperatures, with minimums of 10°C (51°F) and maximums soaring to 39°C (102°F), making the average a balmy 24°C (75°F). Although December experiences less rainfall, with only 80 mm (3.1 in) falling over about 8 days, the humidity increases to 85%. For more detailed insights, you can refer to Santa Cruz do Sul weather in December.
As September unfolds in Santa Cruz do Sul, the weather becomes a vibrant tapestry of contrasts that distinguish it from other months. The transition from cooler early spring temperatures to warm days is palpable, with occasional highs reaching the mid-thirties. While the month averages a moderate 18°C, the notable humidity levels at 74% contribute to a thick, lush atmosphere. Rainfall occurs on several days, adding up to a considerable 154 mm, which nourishes the landscape and invigorates the region's natural beauty. This blend of warmth and moisture makes September a unique and dynamic time, perfect for enjoying the rich biodiversity that flourishes during this period. To explore more about the area's weather patterns throughout the year, visit Santa Cruz do Sul Climate.