Last updated: August 21, 2025
September in Potosi, Bolivia offers a captivating blend of temperatures as the month transitions from winter to spring. With a maximum of 22°C (72°F) and an average of 10°C (50°F), visitors can expect mild days contrasted by cool nights, where temperatures can dip to a minimum of -2°C (28°F). Rainfall is moderate, with about 40 mm (1.6 in) spread across 9 days, resulting in a crisp yet refreshing atmosphere. The relative humidity sits around 65%, contributing to the vibrant and invigorating air that characterizes this historic mining city. Enjoy the unique weather dynamics as you explore the rich cultural heritage of Potosi!
In September, Potosi, Bolivia experiences a subtle yet significant shift in temperatures, marking the transition into spring. The minimum temperature rises to a mild -2°C (28°F), while the average settles at a comfortable 10°C (50°F), reflecting a slow warming trend after the cooler months. With a maximum reaching 22°C (72°F), days become more inviting, making this a pleasant time to explore the city's rich history and stunning landscapes. This gradual increase in temperature from the frosty depths of winter highlights Potosi's unique high-altitude climate, ensuring both crisp mornings and pleasantly warm afternoons that beckon outdoor adventures.
In September, Potosí experiences a notable shift in its precipitation patterns as the dry season approaches its end. The city receives 40 mm (1.6 in) of rain over approximately 9 days, marking a gradual increase from the minimal amounts seen in the preceding months of July and August, which each reported only 11 mm (0.4 in). This increase is part of a broader trend where precipitation begins to rise again after the low point in the winter months. The rainfall not only enhances the region's stunning landscapes but also sets the stage for the more substantial downpours that characterize the upcoming months of October and November, helping to invigorate the local environment as it transitions into the wetter season.
In September, Potosi, Bolivia, experiences a notable shift in humidity levels, with an average of 65%. This marks a gradual increase from the drier months of July and August, which recorded 56% and 51% respectively, reflecting the region's transition towards the wetter season. By this time of year, humidity levels begin to rise as the city approaches the more humid months of October and November, where averages climb back up to 69% and 81%. Such fluctuations illustrate the significant seasonality in Potosi’s climate, moving from the crisp, dry air of mid-year towards the more humid conditions that characterize the spring months ahead.
As September rolls into Potosí, Bolivia, the UV Index reaches 16, maintaining an extreme exposure category. This trend of heightened UV levels continues from the previous months, particularly notable as it follows the intense UV ratings of January through April and precedes even more extreme values in October and November. With a burn time of just 10 minutes, outdoor enthusiasts should remain vigilant and protect their skin from harmful rays during this time. The month reflects a consistent need for sun safety measures, echoing the recommendations for earlier months. For more detailed information on UV levels throughout the year, visit Potosi UV Index.
UV Risk Categories
September in Potosi, Bolivia, continues the trend of abundant sunshine, with 332 hours of glorious sunlight. As the months progress from the beginning of the year, there's a noticeable upward trend in daylight hours, peaking in October with 353 hours. The growth in sunlight hours from 268 hours in January to a robust 340 hours in August sets a vibrant stage for September, marking it as a delightful transition into the sunnier days of the latter part of the year. The consistent increase not only highlights the region's lively atmosphere but also invites exploration and adventure under its vivid sun.
In September, Potosí, Bolivia enjoys a moderate 54% chance of sunny weather, marking a noticeable shift from the winter months. As the dry season continues to fade, this opportunity for sunlight is significantly higher than the rainy months of December and November, which see only 19% and 11% chances, respectively. Following the peak sunshine of July (82%) and August (78%), September retains a respectable amount of sunny days, making it a favorable time for outdoor exploration. As the year progresses towards October with a 60% chance of sunshine, it's clear that the late winter and early spring months invite a more pleasant climate that beckons residents and travelers alike to revel in Potosí's stunning landscapes.
In September, Potosi, Bolivia, enjoys approximately 11 hours of daylight, a continuation of the stable light patterns seen in the months surrounding it. Following the peak brightness of January and February, daylight gradually wanes through the spring months, stabilizing at this comfortable duration from late August onward. This trend signifies a gradual shift towards the shorter days of winter, before a slow ascent back to longer daylight hours in October and beyond. The consistency in daylight duration during September reflects Potosi's unique high-altitude environment, where such variations play a noteworthy role in the daily rhythms of life.
As September rolls into Potosí, Bolivia, the winds pick up slightly, maintaining an average speed of 2.2 m/s (5 mph), which echoes the breezy conditions seen in the preceding months. This consistent wind pattern, transitioning from gentle breezes in the earlier part of the year to a steadier flow during the middle months, creates an invigorating atmosphere in the historic city. Particularly noteworthy is how the winds, having started at a rather calm 1.5 m/s (3 mph) in April, have steadily increased over the summer, reaching this pivotal point in September. This sustained gustiness not only enhances the region's charm but also amplifies the experience of its breathtaking landscapes, making September a perfect time for those who enjoy a crisp, refreshing environment. As the year heads toward its end, the winds remain steady, promising an engaging backdrop for both locals and visitors alike.
Weather in Potosi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Potosi, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present different weather patterns in Potosi. In September, temperatures range from a minimum of -2°C (28°F) to a maximum of 22°C (72°F), with an average temperature of 10°C (50°F). The month sees moderate precipitation of 40 mm (1.6 in) over about 9 days and a humidity level of 65%. In contrast, January is generally milder, with minimum temperatures around 3°C (37°F) and maximums hitting 20°C (69°F), while the average remains close to 10°C (51°F). However, January experiences a substantial increase in rainfall, with 126 mm (4.9 in) over 21 days, leading to a much higher humidity level of 90%. For more detailed information, check out Potosi weather in January.
When comparing the weather in September and February, both months exhibit a similar average temperature of around 10°C (50°F), yet they differ significantly in other aspects. September boasts a milder climate with temperatures ranging from a chilly minimum of -2°C (28°F) to a comfortable maximum of 22°C (72°F), while February experiences slightly warmer conditions where temperatures range from 2°C (35°F) to 20°C (69°F). In terms of precipitation, February is notably wetter, receiving 149 mm (5.9 in) over 24 days, in contrast to September's 40 mm (1.6 in) during just 9 days of rain. Additionally, February's humidity is higher at 90%, compared to September's 65%. For more detailed information on weather patterns in February, you can check out Potosi weather in February.
When comparing the weather in September and March, we observe some notable differences. September typically enjoys milder temperatures, with daily averages around 10°C (50°F) and maximums reaching up to 22°C (72°F). In contrast, March's temperatures are slightly cooler, averaging 10°C (49°F), but with maximums peaking at 20°C (68°F). One major distinction is precipitation; September sees about 40 mm (1.6 in) of rain over 9 days, while March experiences significantly more rainfall, totaling 126 mm (4.9 in) across 23 days. Additionally, March is characterized by a higher humidity level at 90%, compared to September's 65%. For a more detailed look at March weather, you can check Potosi weather in March.
In September, temperatures range from a minimum of -2°C (28°F) to a maximum of 22°C (72°F), with an average of 10°C (50°F). The month typically sees about 40 mm (1.6 in) of precipitation over nine days, and the humidity levels are around 65%. In contrast, April experiences slightly cooler temperatures, with a minimum of -3°C (27°F), an average of 9°C (49°F), and a maximum of 21°C (70°F). This month also tends to be wetter, with approximately 48 mm (1.9 in) of rainfall spread across eleven days, and the humidity is higher at 89%. For more detailed information about the weather in April, visit Potosi weather in April.
In September, the weather showcases a gradual warming trend with average temperatures around 10°C (50°F) and a maximum of 22°C (72°F), making it feel quite comfortable, especially with 40 mm of precipitation spread over 9 days and moderate humidity levels at 65%. In contrast, May tends to be cooler, with an average of 8°C (47°F) and a maximum of 21°C (69°F). Although it experiences lower precipitation at 11 mm over just 3 days, humidity levels are significantly higher at 87%, adding to the chill in the air. For a closer look at May’s conditions, you can check Potosi weather in May.
When comparing the weather in September and June, September generally offers milder temperatures, with daily highs averaging around 22°C (72°F) and lows at 2°C (28°F), while June tends to be cooler, with daytime highs reaching only 21°C (69°F) and lows dipping to -7°C (20°F). Precipitation is notably higher in September, averaging 40 mm (1.6 in) over approximately 9 days, compared to a much drier June, which sees only about 3 mm (0.1 in) over just 1 day. Additionally, humidity levels are relatively high in both months, though June's humidity is slightly greater at 72% compared to September's 65%. For more detailed information, you can visit Potosi weather in June.
When comparing the weather in September and July, it is evident that September tends to be milder and wetter. September's average temperature of 10°C (50°F) is notably warmer than July's average of 7°C (44°F), with maximum temperatures reaching 22°C (72°F) compared to 20°C (68°F) in July. Additionally, September experiences more precipitation, with 40 mm (1.6 in) falling over approximately nine days, while July sees only 9 mm (0.4 in) over just two days. The humidity in September is slightly higher at 65%, compared to 56% in July. For a more detailed look at July's weather patterns, you can visit Potosi weather in July.
In comparing the weather between August and September, we can observe a notable increase in temperature. September experiences a minimum of -2°C (28°F) and an average of 10°C (50°F), while August has a lower minimum of -10°C (15°F) and an average of 8°C (46°F). The maximum temperatures are relatively similar, with September reaching 22°C (72°F) compared to August's 21°C (71°F). Additionally, September sees more precipitation, with 40 mm (1.6 in) over 9 days, in contrast to August, which only received 11 mm (0.4 in) on just 1 day. Humidity also rises in September to 65%, compared to 51% in August. For more detailed information about August weather patterns, you can check Potosi weather in August.
In September, the weather is characterized by mild temperatures ranging from a minimum of -2°C (28°F) to a maximum of 22°C (72°F), with an average of 10°C (50°F). The month experiences relatively low precipitation at 40 mm (1.6 in) over 9 days, accompanied by a humidity level of 65%. In contrast, October sees slightly cooler nights with a minimum of -3°C (27°F) and a marginally warmer average of 11°C (52°F) and maximum of 23°C (74°F). Rainfall increases in October to 57 mm (2.3 in) over 13 days, resulting in a higher humidity level of 69%. For further details, you can check Potosi weather in October.
In comparing September and November weather, both months showcase relatively mild temperatures, with September featuring average highs of 22°C (72°F) and lows reaching 2°C (36°F), while November maintains a slightly warmer average of 11°C (53°F) with peak temperatures at 23°C (73°F). However, November experiences significantly more precipitation, totaling 79 mm (3.1 in) over 17 days, compared to September's 40 mm (1.6 in) over just 9 days. This increase in rainfall also contributes to a rise in humidity levels, with November averaging at 81%, up from September’s 65%. For a closer look at November's conditions, you can explore Potosi weather in November.
In September, the weather in Potosi is characterized by a mild temperature range, with minimums dipping to -2°C (28°F) and maximums reaching up to 22°C (72°F). The month sees an average temperature of 10°C (50°F) and experiences about 40 mm (1.6 in) of precipitation over 9 days, accompanied by a humidity level of 65%. In contrast, December brings slightly warmer conditions with minimums of 3°C (37°F) and maximums peaking at 24°C (75°F), yielding an average of 11°C (51°F). However, December is significantly wetter, with precipitation increasing to 159 mm (6.2 in) over 26 days and humidity rising to 85%. For a detailed look at the weather trends, you can refer to Potosi weather in December.
As September rolls in, Potosí experiences a unique transition where the chill of winter begins to wane, making way for slightly warmer temperatures. With an average temperature around 10°C (50°F), the weather is notably milder compared to the colder months prior, while still presenting a mix of brisk days and cooler nights. The increased precipitation, with 40 mm of rain over 9 days, signifies the onset of spring, fostering a sense of renewal in the area. This month's humidity levels average around 65%, making for a refreshing, albeit sometimes damp, atmosphere. For a deeper dive into Potosí’s climate trends throughout the year, visit Potosi Climate.