Last updated: October 30, 2025
In Rurrenabaque, Bolivia, September showcases a vibrant tropical climate characterized by maximum temperatures soaring up to 38°C (100°F) and an average hovering around 26°C (80°F). As the month unfolds, temperatures can dip to a refreshing minimum of 15°C (59°F) at night. Rainfall plays a role, with an accumulated precipitation of 82 mm (3.2 in) over approximately 10 days, contributing to the lush surroundings. With a humidity level of 62%, the air is often warm and inviting, creating a dynamic and captivating atmosphere for visitors and residents alike.
In September, Rurrenabaque experiences a delightful transition as temperatures begin to rise, bringing a sense of warmth to the Bolivian jungle. With minimums around 15°C (59°F) and average highs peaking at 38°C (100°F), this month represents a significant leap from the cooler conditions of the previous months. The mild nights provide a comfortable reprieve, while the increasing afternoon heat invites outdoor adventures and exploration. As the average temperature stabilizes at 26°C (80°F), September offers a perfect blend of warmth and sunshine, making it an ideal time for travelers to immerse themselves in the vibrant beauty of this breathtaking region.
September in Rurrenabaque, Bolivia, ushers in a transition with precipitation totaling 82 mm (3.2 in), marking a slight uptick following the drier months of July and August. This increase brings an end to the notable dry spell, as rainfall returns for about 10 days of the month. Compared to the preceding months, September's precipitation is modest, yet it sets the stage for the wetter October, hinting at the approaching rainy season. This shift not only revitalizes the local landscape but also reflects a larger trend—Rurrenabaque experiences a substantial concentration of rain from October through December, with September serving as a gentle prelude to nature's dramatic seasonal symphony.
In Rurrenabaque, Bolivia, September marks a subtle transition in humidity levels, with an average of 62%. This slight increase from the drier months of July and August—where humidity dipped to 61% and 54%, respectively—signals the onset of the rainy season. After a prolonged period of significantly lower humidity in the winter months, the rise suggests the approaching warmth of spring, as moisture begins to return to the region. Following September, humidity continues to rise again into October and November, with values reaching 65% and 82%, highlighting the characteristic fluctuations of Bolivia’s tropical climate leading up to the more humid and vibrant months ahead.
In September, Rurrenabaque, Bolivia experiences a UV Index of 13, categorized as extreme, with a quick burn time of just 10 minutes. This month continues a trend of high UV levels, maintaining the intensity seen throughout much of the year. Notably, from January to March, the index peaks consistently at 15, indicating a hazardous level of solar exposure that remains substantial even into the following months. While there is a slight decrease in April and June, the UV Index rises again in August, illustrating a persistent need for sun protection. As we head into October and November, the UV Index escalates further, reaching a staggering 16, reinforcing the importance of vigilance against UV radiation. For more detailed information on seasonal trends and safety measures, visit the comprehensive Rurrenabaque UV Index.
UV Risk Categories
As September sweeps into Rurrenabaque, Bolivia, the region basks in an impressive 295 hours of sunshine, making it one of the sunniest months of the year. This radiant burst of light follows a vibrant summer, with sunshine hours gradually increasing from 217 in January to a peak of 294 in August. The gradual climb in sunlight throughout the year reveals a fascinating trend; from the onset of winter in June, where hours dipped to 245, Rurrenabaque springs back to life in September, offering nearly 10 more hours of sunshine than August. This steady rise not only enhances the warmth in the air but also sets the stage for outdoor adventures in the lush surrounding landscapes, making September a perfect month for exploring the beauty of this Bolivian gem.
In Rurrenabaque, Bolivia, the likelihood of sunny weather in September shows a promising trend with a 43% chance of sun. This marks a significant increase compared to the preceding months, particularly from the drier, less sunny days of October (26%) and earlier months like November (11%) and December (6%). September's sunshine potential follows the peak of the dry season, which starts in July (56%) and August (68%), suggesting a gradual transition as the region prepares for the wetter months ahead. As the landscape shifts from the lushness of the rainy season to the balmy days of spring, September is an appealing time for travelers hoping to bask in the warmth of the sun amid stunning natural beauty.
In Rurrenabaque, Bolivia, the rhythm of daylight reveals an intriguing trend throughout the year. As the seasons shift, daylight duration fluctuates notably; while January through March consistently bask in 12 hours of sun, April to August sees a slight dip to 11 hours. However, September heralds a return to longer days, once again offering 12 hours of bright, vibrant daylight, which continues through to December. This cyclical pattern not only marks the transition from the dry season to the warmer months but also invites residents and visitors alike to embrace the beauty of the changing light.
As September rolls into Rurrenabaque, Bolivia, the gentle breezes begin to pick up slightly, with average wind speeds reaching 1.7 m/s (4 mph). This marks a subtle yet noticeable increase from the lighter winds of the preceding months. The trend shows that as the year transitions from the cooler winter toward a warmer spring, the winds are beginning to strengthen, mirroring the gradual rise in temperatures. With the consistency of 1.7 m/s carried into August, September ushers in an invigorating freshness, offering a delightful backdrop for outdoor adventures in this picturesque Amazonian gateway. This subtle shift in wind speed is a reminder of nature’s rhythms, as Rurrenabaque continues to embrace the seasonal changes.
Weather in Rurrenabaque varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rurrenabaque, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather patterns despite having the same average temperature of 26°C (80°F). In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (100°F), accompanied by moderate humidity at 62% and less rainfall, totaling 82 mm (3.2 in) over about 10 days. In contrast, January experiences higher minimum temperatures, starting at 19°C (66°F), and moderate maximums of 35°C (96°F), but is significantly wetter, with a substantial 321 mm (12.6 in) of precipitation spread over 21 days, and much higher humidity at 92%. The increased rainfall and humidity in January create a markedly different atmosphere compared to the drier, more variable conditions of September. For more detailed information about the weather during this time, check Rurrenabaque weather in January.
When comparing the weather in September and February, notable differences emerge. September experiences a broader temperature range, with minimums of 15°C (59°F) and maximums reaching up to 38°C (100°F), while averaging around 26°C (80°F). In contrast, February has a slightly higher minimum temperature of 21°C (70°F) but a lower maximum of 34°C (94°F), maintaining an average close to September's at 26°C (79°F).
Precipitation levels significantly differ as well; September receives 82 mm (3.2 in) over approximately 10 days, whereas February sees a substantial increase with 348 mm (13.7 in) across 24 days, resulting in much higher humidity at 90%. For a closer look at February weather trends, you can visit Rurrenabaque weather in February.
In September, weather conditions are generally warmer, with temperatures ranging from a mild 15°C (59°F) to a high of 38°C (100°F), and an average temperature of 26°C (80°F). The month experiences moderate rainfall, totaling 82 mm (3.2 in) across approximately 10 days, and humidity levels are around 62%. In contrast, March sees slightly higher nighttime temperatures with a minimum of 19°C (66°F) and a maximum of 34°C (94°F), while the average remains the same at 26°C (79°F). However, March is significantly wetter, receiving 322 mm (12.7 in) of rain over about 25 days, contributing to higher humidity levels of 91%. For more detailed insights about the weather in March, you can visit Rurrenabaque weather in March.
When comparing the weather in September and April, both months exhibit relatively warm average temperatures of around 26°C (80°F). However, September can reach higher maximum temperatures, peaking at 38°C (100°F), while April's maximum is more moderate at 34°C (93°F). Humidity levels are notably higher in April at 89%, compared to September's 62%, making April feel more humid and muggy. Additionally, April experiences significantly more rainfall, with 176 mm (6.9 in) over 19 days, contrasting with September's 82 mm (3.2 in) over only 10 days. For more details on weather specifics, you can refer to Rurrenabaque weather in April.
Comparing the weather of September and May reveals some interesting contrasts. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (100°F), with an average of 26°C (80°F). The month experiences around 82 mm (3.2 in) of precipitation over ten days, with humidity at a moderate 62%. In contrast, May tends to be a bit cooler, with temperatures ranging from 14°C (57°F) to 33°C (91°F) and an average of 24°C (75°F). Though the total precipitation is similar at 80 mm (3.2 in) over ten days, May has significantly higher humidity at 89%. This increased humidity can contribute to a more muggy atmosphere, making May feel warmer than its temperatures suggest. For more detailed information about May weather, you can check Rurrenabaque weather in May.
In September, temperatures in Rurrenabaque soar compared to June, with a minimum of 15°C (59°F) and an average high reaching 38°C (100°F), highlighting the heat of the transitional season. In contrast, June experiences cooler temperatures, averaging around 22°C (72°F) with a maximum of 32°C (89°F). While September brings more frequent showers, with precipitation occurring on 10 days and totaling 82 mm (3.2 in), June is slightly drier with just 73 mm (2.9 in) of rain over 7 days. Moreover, June's humidity is higher at 79%, compared to September’s 62%, giving the earlier month a more tropical feel. For more insights into the weather patterns, you can check Rurrenabaque weather in June.
In comparing the weather between September and July, September features significantly warmer temperatures, with a minimum of 15°C (59°F) and an average high reaching 38°C (100°F), compared to July's cooler range of 9°C (49°F) minimum and a maximum of 33°C (92°F). Additionally, September experiences higher precipitation levels, averaging 82 mm (3.2 in) over about 10 days, while July sees only 35 mm (1.4 in) across just 5 days. Despite the increased rainfall in September, the humidity remains relatively similar in both months, with September at 62% and July at 61%. For further details on July weather, you can refer to Rurrenabaque weather in July.
In comparing the weather of September and August, September experiences slightly warmer temperatures with a minimum of 15°C (59°F), an average of 26°C (80°F), and a maximum of 38°C (100°F), while August has a lower minimum of 8°C (47°F), an average of 24°C (75°F), and a maximum of 36°C (98°F). Additionally, September sees increased precipitation at 82 mm (3.2 in) over about 10 days, compared to August’s 51 mm (2.0 in) over 7 days. The humidity levels also rise in September to 62%, compared to 54% in August. For a more detailed overview, you can check Rurrenabaque weather in August.
In September, the weather is characterized by a minimum temperature of 15°C (59°F) and an average temperature of 26°C (80°F), peaking at a maximum of 38°C (100°F). This month sees around 82 mm (3.2 in) of precipitation spread over about 10 days, with humidity levels averaging 62%.
October, on the other hand, brings slightly warmer nights with a minimum temperature of 18°C (64°F) and maintains an average temperature of 27°C (81°F), continuing to reach a maximum of 38°C (101°F). However, it also becomes wetter, with precipitation rising to 167 mm (6.6 in) over 14 days, accompanied by a slight increase in humidity to 65%. For a more detailed look at the weather patterns in October, you can check out Rurrenabaque weather in October.
September weather is marked by warm temperatures, with a minimum of 15°C (59°F) and an average of 26°C (80°F), peaking at 38°C (100°F). The month sees moderate precipitation, with 82 mm (3.2 in) over 10 days and a humidity level of 62%. In contrast, November experiences slightly higher temperatures, with a minimum of 18°C (65°F) and an average of 27°C (81°F), while also reaching similar maximums of 38°C (102°F). However, November is notably wetter, receiving 229 mm (9.0 in) of rain over 19 days and experiencing increased humidity at 82%. This shift in weather patterns can significantly impact outdoor activities and planning. For more details, you can check Rurrenabaque weather in November.
September and December showcase contrasting weather patterns. In September, temperatures range from a minimum of 15°C (59°F) to a maximum of 38°C (100°F), with an average of 26°C (80°F). This month has a moderate level of precipitation, totaling 82 mm (3.2 in) over about 10 days and a humidity level of 62%. In contrast, December's weather features a milder minimum temperature of 21°C (70°F) and a slightly lower maximum of 35°C (96°F), with an average still around 26°C (79°F). However, December experiences significantly more rainfall, accumulating 425 mm (16.7 in) over approximately 25 days, accompanied by high humidity at 91%. For more detailed information, check out Rurrenabaque weather in December.
As September rolls into Rurrenabaque, travelers can expect a unique blend of warmth and refreshing rainfall that sets it apart from other months. With average temperatures hovering around a comfortable 26°C (80°F), the heat can occasionally peak at 38°C (100°F), bringing a summer-like intensity. However, this month also introduces a notable increase in precipitation, with approximately 82 mm (3.2 in) falling across about 10 days, which contributes to the region's lush landscapes. The humidity level maintains a moderate 62%, adding a touch of tropical ambiance to the atmosphere. For those navigating this vibrant climate, it's essential to prepare for both sunny days and possible showers, making September a captivating time to experience Rurrenabaque's natural beauty. For more insights into the different seasons, check out Rurrenabaque Climate.