September Weather in Santa Cruz de la Sierra, Bolivia

Last updated: August 21, 2025

In September, Santa Cruz de la Sierra experiences a delightful blend of warm temperatures and occasional rain. With daytime highs peaking at 37°C (100°F) and an average of 25°C (78°F), the city offers a comfortable climate for outdoor activities. Evenings bring a refreshing coolness, with lows around 11°C (51°F). Rainfall is modest, with a total of 35 mm (1.4 in) spread over approximately 6 days, contributing to a humidity level of 39%. This month is perfect for those looking to enjoy the city's vibrant atmosphere while staying comfortable in the sunny tropics.

September Temperature in Santa Cruz de la Sierra

In September, Santa Cruz de la Sierra experiences a delightful transition toward warmer days, with minimum temperatures around 11°C (51°F) and an average of 25°C (78°F). As the month progresses, the maximum temperature can soar up to 37°C (100°F), hinting at the region's characteristic warmth. Following the cooler months of July and August, September brings a noticeable rise in temperatures, blending comfortable days with the first hints of summer heat. This pattern sets the stage for a vibrant and inviting climate, encouraging outdoor activities and exploration in Bolivia's bustling heart.

September Weather in Santa Cruz de la Sierra: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santa Cruz de la Sierra, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Cruz de la Sierra, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec797978767168697278797979
Data source: Temperature data for Santa Cruz de la Sierra generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Santa Cruz de la Sierra

In September, Santa Cruz de la Sierra experiences a notable dip in precipitation, with only 35 mm (1.4 in) of rainfall over approximately 6 days. This pattern reflects a gradual transition into the drier months, following the wetter season that peaks from November to December. Comparatively, September's precipitation marks a significant reduction from the more abundant rains of earlier months, such as January and February, which often boast over 100 mm of rainfall. As the city braces for October's expected increase to 89 mm (3.5 in), September emerges as a brief pause, hinting at the impending shift towards the more pronounced rainy season once again. This trend highlights the dynamic, evolving climate of the region, where moisture ebbs and flows with the changing seasons.

September Precipitation Trends in Santa Cruz de la Sierra

The chart displays monthly precipitation patterns in Santa Cruz de la Sierra, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Santa Cruz de la Sierra, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec1391199768664836553589140194
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santa Cruz de la Sierra

In September, humidity in Santa Cruz de la Sierra reaches a notably low 39%, continuing the trend of decreasing moisture that begins in the middle of the year. Following the lush, humid months of the first half, where levels hover above 80%, a significant drop occurs from May onwards, with July and August recording their annual lows at 47% and 40%, respectively. This September figure remains consistent with October's humidity, reflecting a period of dry conditions before the humidity begins to rise again in November. Such fluctuations showcase the city's distinct transition from a wet, monsoon-like climate earlier in the year to a drier, more temperate atmosphere as it approaches the end of the year.

September Average Humidity in Santa Cruz de la Sierra

This chart illustrates the average monthly humidity levels in Santa Cruz de la Sierra, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Santa Cruz de la Sierra is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%86%86%79%64%47%40%39%39%70%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santa Cruz de la Sierra

In September, Santa Cruz de la Sierra experiences a UV Index of 12, categorized as extreme, which means that even just 10 minutes of sun exposure can lead to skin damage. This marked a short term decrease from the previous months, reflecting a subtle dip from the peak indices seen in winter and spring. The trend reveals that the region grapples with exceptionally high UV levels throughout the year, particularly from January to April, with indices often reaching 15 or 16. As the seasons shift towards October, residents and visitors alike should remain vigilant, as the UV Index escalates once more. For more detailed information about UV levels, visit Santa Cruz de la Sierra UV Index.

Maximum UV Index Levels in Santa Cruz de la Sierra for September

The chart shows the monthly maximum UV Index (UVI) for Santa Cruz de la Sierra in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Santa Cruz de la Sierra typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1515141310891012151616
Data source: Santa Cruz de la Sierra September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Santa Cruz de la Sierra

September in Santa Cruz de la Sierra shines brightly, with 298 hours of sunshine that perfectly encapsulates the city's vibrant atmosphere. As winter wanes and spring approaches, the sun begins to grace the skies more generously. This month stands out with a substantial increase compared to November's 286 hours and October's 300 hours, signaling a transition into a period of longer days and warmer weather. The trend is unmistakable; as we move into the final months of the year, the sun's presence remains consistent, peaking at an impressive 302 hours in March. September, with its abundant sunlight, invites outdoor adventures and leisurely afternoons, making it an ideal time to explore the beauty and culture of Santa Cruz de la Sierra.

Monthly Sunshine Duration in Santa Cruz de la Sierra: September Highlighted

The September sunshine duration represents the total number of hours Santa Cruz de la Sierra experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec246h267h302h278h252h232h277h293h298h300h286h283h
Data source: Santa Cruz de la Sierra September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Santa Cruz de la Sierra During September

As September rolls in, Santa Cruz de la Sierra witnesses a notable shift in its weather patterns. With a 53% chance of sunny weather, this month stands out as a significant improvement compared to the earlier months of the year, where the likelihood of sunshine hovered below 43%. This upward trend peaks in the dry months of July and August, but September maintains a respectable level, suggesting a pleasant blend of warmth and clear skies. As the city transitions into the latter part of the year, the potential for sunshine makes September an appealing time for outdoor activities, offering ample opportunities to bask in the Bolivian sun before the rainy season begins to encroach.

Percentage of Sunny Days in September in Santa Cruz de la Sierra

The chart illustrates the percentage of sunny days in Santa Cruz de la Sierra throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Santa Cruz de la Sierra experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%31%29%35%43%37%66%69%53%40%16%17%
Data source: Santa Cruz de la Sierra September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Santa Cruz de la Sierra in September

In September, Santa Cruz de la Sierra experiences a consistent 11 hours of daylight, aligning with the trend of shorter days as the region transitions into the heart of the dry season. This marks a continuation of the previous months, where daylight duration has remained stable at 11 hours since early April. As the city moves toward the warmer months, daylight will soon begin to increase again, with October and November promising a gradual return to 12 hours of sunlight. Overall, September's daylight reflects the steady rhythm of the Bolivian climate, creating a balanced and predictable pattern for residents and visitors alike.

Average Daylight Hours in Santa Cruz de la Sierra for September

The chart illustrates the variation in daylight duration in Santa Cruz de la Sierra throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec13h 2m12h 39m12h 9m11h 39m11h 15m11h 3m11h 10m11h 31m11h 59m12h 29m12h 56m13h 9m
Data source: Santa Cruz de la Sierra daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Santa Cruz de la Sierra

In September, Santa Cruz de la Sierra experiences a notable increase in wind speed, reaching an average of 4.3 m/s (10 mph)—the highest of the year. This gentle breeze marks a shift from the more tranquil conditions of earlier months, as the winds gradually gain strength through the late winter and early spring transition. Following a mild August, where winds averaged 4.1 m/s (9 mph), September sets the stage for a refreshing change, making it an ideal time for outdoor activities and exploration. As the seasons blend, these invigorating winds hint at the vibrant energy of spring just around the corner, inviting both locals and visitors to embrace the brisk air and scenic beauty of Bolivia.

Average September Wind Speed in Santa Cruz de la Sierra

The chart displays monthly wind speed patterns in Santa Cruz de la Sierra, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.02.82.73.33.73.93.94.14.3 m/s4.03.32.7
Data source: Santa Cruz de la Sierra September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Santa Cruz de la Sierra Compares to Other Months

Weather in Santa Cruz de la Sierra varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Cruz de la Sierra, focusing on differences in temperature, rainfall, humidity, and UV levels.

In September, the weather in Santa Cruz de la Sierra is warm and relatively dry, with average temperatures ranging from a minimum of 11°C (51°F) to a maximum of 37°C (100°F). The month sees about 35 mm (1.4 in) of rainfall spread over approximately 6 days, resulting in a humidity level of 39%. In contrast, January brings much warmer and more humid conditions, with minimum temperatures starting at 19°C (66°F) and peaking at 36°C (98°F). Precipitation increases significantly to 139 mm (5.5 in) over 16 days, causing humidity levels to rise dramatically to 86%. For a more detailed look at the weather during this month, you can refer to Santa Cruz de la Sierra weather in January.

September and February showcase distinct weather characteristics in Santa Cruz de la Sierra. In September, temperatures range from a cooler minimum of 11°C (51°F) to a warm maximum of 37°C (100°F), with an average of 25°C (78°F). The month sees relatively low precipitation of 35 mm (1.4 in) over about six days, accompanied by a humidity level of 39%. In contrast, February experiences a milder minimum temperature of 19°C (67°F) and a maximum of 36°C (96°F), with an average temperature slightly higher at 26°C (79°F). February is much wetter, with 119 mm (4.7 in) of rainfall spread over 15 days and a significantly higher humidity level of 84%. For more details, you can refer to Santa Cruz de la Sierra weather in February.

In comparing the weather of September and March, we see notable differences. September generally enjoys warmer temperatures, with an average of 25°C (78°F) and a maximum reaching up to 37°C (100°F), while March maintains a similar average of 26°C (78°F) but starts at a higher minimum of 15°C (60°F). Precipitation levels vary significantly; September experiences only 35 mm (1.4 in) over 6 days, whereas March sees more frequent rain, totaling 97 mm (3.8 in) across 16 days. This results in considerably higher humidity in March at 85%, compared to September’s 39%. For those interested in specific details, you can check Santa Cruz de la Sierra weather in March.

When comparing the weather in September and April, several notable differences emerge. September boasts warmer temperatures, with a minimum of 11°C (51°F) and an average of 25°C (78°F), reaching highs of up to 37°C (100°F). In contrast, April has a slightly cooler average temperature of 24°C (76°F), with minimums of 15°C (60°F) and maximums of 35°C (95°F). Additionally, September experiences lower humidity at 39% and less precipitation at 35 mm (1.4 in) over approximately 6 rainy days, while April sees significantly higher humidity at 86% and increased rainfall, totaling 68 mm (2.7 in) across about 10 days. For a detailed look at April weather specifics, visit Santa Cruz de la Sierra weather in April.

In September, temperatures in Santa Cruz de la Sierra range from a minimum of 11°C (51°F) to a maximum of 37°C (100°F), with an average of 25°C (78°F). The month experiences relatively low humidity at 39% and only 35 mm (1.4 inches) of precipitation over approximately 6 days. In contrast, May offers cooler weather, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 32°C (91°F) and an average of 22°C (71°F). The humidity is significantly higher at 79%, along with increased precipitation totaling 66 mm (2.6 inches) over about 10 days. This stark difference in weather characteristics highlights the transition from the warm, dry conditions of September to the cooler and wetter climate of May. For more information, check out the detailed Santa Cruz de la Sierra weather in May.

When comparing the weather in September and June, September tends to be warmer with average temperatures reaching around 25°C (78°F), while June has a cooler average of 20°C (68°F). September can also be significantly hotter, with maximum temperatures soaring up to 37°C (100°F), compared to June's maximum of 30°C (86°F). Precipitation is lower in September at 35 mm (1.4 in) over approximately 6 days, whereas June experiences more rainfall, totaling 48 mm (1.9 in) over about 9 days. Additionally, June is more humid, with a humidity level of 64% compared to September's 39%. For more detailed insights on June weather, you can visit Santa Cruz de la Sierra weather in June.

September experiences warmer temperatures compared to July, with a minimum of 11°C (51°F) and a maximum reaching up to 37°C (100°F), while July has cooler temperatures that range from 5°C (41°F) to a maximum of 32°C (90°F). The average temperature in September is significantly higher at 25°C (78°F) compared to July's average of 20°C (69°F). Both months have similar levels of precipitation, with September receiving 35 mm (1.4 in) over 6 days and July slightly more with 36 mm (1.4 in) over 5 days. Additionally, September has lower humidity at 39%, while July feels more humid with a humidity level of 47%. For more information on July weather, check out Santa Cruz de la Sierra weather in July.

In comparing the weather between August and September, September tends to be warmer overall, with average temperatures rising from 22°C (72°F) in August to 25°C (78°F). The minimum temperatures are also slightly higher, at 11°C (51°F) in September compared to 8°C (46°F) in August. Despite September experiencing more days of air temperatures hitting the maximum of 37°C (100°F), it sees less precipitation at 35 mm (1.4 in) over 6 days, compared to August's 55 mm (2.2 in) over 5 days. Humidity levels remain fairly consistent, slightly decreasing from 40% in August to 39% in September, indicating a marginally drier feel as the month progresses. For a closer look at August's conditions, you can refer to Santa Cruz de la Sierra weather in August.

September and October in Santa Cruz de la Sierra present some interesting weather contrasts. In September, temperatures range from a minimum of 11°C (51°F) to a maximum of 37°C (100°F), with dry conditions resulting in just 35 mm (1.4 in) of precipitation over six days and humidity levels at a comfortable 39%. In contrast, October sees a slight increase in the minimum temperature to 15°C (59°F) and a marginal increase in the average temperature to 26°C (80°F), while the maximum temperature edges up to 38°C (101°F). However, October is wetter, experiencing 89 mm (3.5 in) of precipitation over ten days, maintaining the same humidity level of 39%. For a detailed look at what to expect this month, check out Santa Cruz de la Sierra weather in October.

In September, the weather in Santa Cruz de la Sierra is characterized by warmer temperatures, with a minimum of 11°C (51°F), an average of 25°C (78°F), and a maximum of 37°C (100°F). The month sees relatively low precipitation at 35 mm (1.4 in) over six days and maintains a humidity level of 39%.

Contrastingly, November brings slightly cooler minimum temperatures at 16°C (61°F) but maintains a similar average temperature of 26°C (80°F). However, it can peak higher with maximum temperatures reaching 39°C (102°F). Rainfall significantly increases in November, with 140 mm (5.5 in) spread across 15 days, leading to a notable rise in humidity at 70%. For more details on the weather specifics for November, you can refer to Santa Cruz de la Sierra weather in November.

September and December exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 11°C (51°F) to a maximum of 37°C (100°F), with an average of 25°C (78°F). The month sees relatively low precipitation, totaling 35 mm (1.4 in) over about 6 days, accompanied by a humidity level of 39%. In contrast, December experiences warmer temperatures, with a minimum of 19°C (67°F) and a slightly lower maximum of 36°C (97°F), averaging 26°C (79°F). However, it is significantly wetter, receiving 194 mm (7.7 in) of rain across 18 days and much higher humidity at 83%. For more insights into December weather, check out Santa Cruz de la Sierra weather in December.

Compare Santa Cruz de la Sierra's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Santa Cruz de la Sierra

As September unfolds in Santa Cruz de la Sierra, the city experiences a notable transition in its weather patterns. Daytime temperatures soar, reaching up to 37°C (100°F), making it one of the warmer months. While the average comfortably hovers around 25°C (78°F), the nights bring a refreshing relief with cooler temperatures dipping to 11°C (51°F). With a fair amount of humidity at 39% and occasional rain, as indicated by the 6 days of precipitation totaling 35 mm (1.4 in), September stands out as a bridge between the dry season and the upcoming wetter months. This month also offers limited rainfall compared to the heavier downpours of the following months, ensuring scenic and enjoyable days for both residents and visitors alike. For a deeper understanding of how September fits into the annual weather patterns, explore the detailed insights in Santa Cruz de la Sierra Climate.