Last updated: August 21, 2025
In Pasto, Colombia, September brings a mix of mild temperatures and frequent rainfalls, creating a unique climate for locals and visitors alike. The maximum temperature reaches up to 23°C (74°F), while the average hovers around a comfortable 15°C (58°F). As the month unfolds, residents can expect minimum temperatures to dip to 6°C (43°F), so layering is essential. With an impressive precipitation total of 102 mm (4.0 in) spread over 19 days, the atmosphere remains humid at approximately 53%, adding a refreshing touch to the crisp September air.
In Pasto, Colombia, September showcases a pleasant climate that continues the trend of mild temperatures characteristic of the region. With minimums around 6°C (43°F) and maximums reaching 23°C (74°F), visitors can expect comfortably cool days. The average temperature slightly rises to 15°C (58°F), making it one of the more inviting months for exploring this picturesque city. As the rainfall typically increases towards the end of the year, September stands out with its balanced warmth, inviting adventurers to enjoy the vibrant culture and stunning landscapes under relatively stable and undefined weather conditions. Overall, this month perfectly encapsulates the temperate essence of Pasto, blending comfort with the charm of Colombian highland duality.
In September, Pasto, Colombia experiences a notable shift in its precipitation pattern, with 102 mm (4.0 in) of rain falling over 19 days. This marks a slight increase from August, which was the driest month of the year with only 85 mm (3.4 in). Although September doesn't reach the intense levels seen in the wet season peaks of March and November, it signals a gradual return to wetter conditions, setting the stage for the heavier rainfall typical in the months that follow. This month effectively bridges the drier summer period and the sustained downpours of late autumn, illustrating a dynamic climate that reflects both seasonal transitions and the lush landscapes of the Andes.
In Pasto, Colombia, the month of September brings a noticeable shift in humidity, with levels dropping to 53%—the lowest point of the year. This decrease follows a summer pattern where humidity tends to taper off after the wetter months of May and June, which each see a striking 93% humidity. As the year progresses, humidity generally fluctuates, peaking again towards the end of the year, but September stands out for its crispness, providing a brief respite before the humidity climbs back up to 67% by October. The overall trend indicates that while Pasto experiences considerable dampness throughout much of the year, September offers a refreshing change, inviting residents and visitors alike to enjoy the milder conditions.
In September, Pasto, Colombia, experiences a UV Index of 16, categorizing it as extreme with a rapid burn time of just 10 minutes. This month follows a pattern observed earlier in the year, where the UV Index consistently remains high, ranging from 14 to 19 from January through August. Though slightly lower than the peaks seen in March and April, September still demands vigilant sun protection, continuing the trend of heightened UV exposure that characterizes this region. As the seasons transition, it’s crucial to stay informed and prepared to protect your skin during these intense UV conditions. For more details, visit Pasto UV Index.
UV Risk Categories
September shines brightly in Pasto, Colombia, with an impressive 309 hours of sunshine, reflecting one of the year's peak months for radiant days. Following a robust August, which recorded 315 hours of sunlight, September maintains that vibrant energy, contributing to a pronounced trend of increasing daylight as the year progresses. From the lower figures in the first half of the year, such as 235 hours in January, the data reveals an uplifting gradual climb toward sunnier days, culminating in summer’s embrace. As the months blend into the vibrant hues of autumn, Pasto enjoys a remarkable consistency in sunshine, suggesting that September is a splendid time to bask in the region's natural beauty.
In Pasto, Colombia, September stands out as a notable month for sunshine, boasting a 28% chance of sunny weather—the highest likelihood throughout the year. This increase in sunny days marks a significant shift from the earlier months, where the chances drop to as low as 5% during March and April. After a gradual rise during the dry season from July’s 19% to August’s 14%, September provides a welcome transition towards more favorable weather. With the vibrant landscapes of Pasto basking in the sun, September proves to be an attractive time for outdoor activities and exploration.
In Pasto, Colombia, September brings a continuation of an intriguing trend observed throughout the year: a consistent 12 hours of daylight each day. This remarkable uniformity in daylight duration reflects the region's unique geographical positioning near the equator, where significant variations in day length become less pronounced. As September unfolds, residents enjoy a balanced distribution of light and darkness, fostering a rhythmic daily routine that seamlessly transitions from the vibrant warmth of day into the tranquil embrace of night. This steady daylight pattern not only enhances outdoor activities but also underscores the charm of living in a place where the sun reliably graces the skies, month after month.
As September rolls into Pasto, Colombia, the wind picks up slightly, averaging 2.0 m/s (4 mph). This marks a notable dip from the breezier months of July and August, where wind speeds peaked. However, it still holds a mild allure reminiscent of the early summer months. The gentle breeze in September provides a refreshing change without the intensity that summer brought, perfectly complementing the vibrant atmosphere of the city as it transitions into the fall season. The trend shows a gradual increase in wind speed throughout the mid-year, reaching its zenith in late summer before tapering off as the year wanes, inviting locals and visitors alike to enjoy the serene climate.
Weather in Pasto varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Pasto, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January have similar average temperatures, hovering around 15°C (58°F), but the overall experience of the two months differs significantly. September usually sees slightly higher maximum temperatures of 23°C (74°F), while January's temperatures reach a similar peak but are accompanied by more humidity at 72% compared to September's 53%.
Precipitation levels also vary, with September receiving about 102 mm (4.0 in) over 19 days, whereas January is wetter with 163 mm (6.4 in) spread over 21 days. These factors contribute to a more humid and rainy atmosphere in January. For a detailed look at January weather, check out Pasto weather in January.
In comparing the weather of September and February, we find some interesting similarities and differences. Both months have a similar maximum temperature of 23°C (74°F), providing comfortable days. However, September features slightly cooler average temperatures, with a minimum of 6°C (43°F) compared to February's 7°C (45°F), making February marginally warmer overall. Notably, February experiences greater precipitation, with 173 mm (6.8 in) spread over 24 days, whereas September sees only 102 mm (4.0 in) over 19 days. Additionally, humidity levels are higher in February at 66%, compared to 53% in September, contributing to a more humid atmosphere. For more detailed information, you can check Pasto weather in February.
In comparing the weather of September and March, both months present mild temperatures, but March tends to be slightly warmer. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 23°C (74°F), with an average of 15°C (58°F). In contrast, March offers a minimum of 7°C (44°F) and a maximum of 24°C (75°F), with a similar average of 14°C (58°F). However, March is significantly wetter, receiving 273 mm (10.8 in) of precipitation over 29 days compared to September's 102 mm (4.0 in) across 19 days. Additionally, humidity levels are higher in March at 74%, compared to 53% in September. For further details, check out Pasto weather in March.
September and April exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 23°C (74°F), with an average of about 15°C (58°F). The month sees moderately high humidity at 53% and experiences 102 mm (4.0 in) of precipitation over 19 days. In contrast, April is slightly warmer, with temperatures peaking at 22°C (72°F) and averaging around 14°C (58°F). However, April is notably wetter, receiving 237 mm (9.3 in) of rainfall across 27 days and experiencing higher humidity at 83%. This increased precipitation and humidity in April can significantly affect daily activities. For a detailed overview of April's weather in Pasto, visit Pasto weather in April.
When comparing the weather in September and May, several key differences emerge. September experiences milder temperatures, with a minimum of 6°C (43°F) and a maximum of 23°C (74°F), while May is slightly warmer with temperatures ranging from 8°C (48°F) to 22°C (73°F). Both months have similar average temperatures of around 15°C (58°F), but May is notably wetter, receiving 241 mm (9.5 in) of precipitation over 28 days compared to September's 102 mm (4.0 in) over 19 days. Moreover, the humidity in May is significantly higher at 93%, contrasting with September's 53%. These factors make May feel much more humid and rainy, which is reflected in the conditions detailed in Pasto weather in May.
September and June present contrasting weather patterns. In September, the temperatures range from a minimum of 6°C (43°F) to a maximum of 23°C (74°F), with an average of 15°C (58°F). The precipitation level is notable, with 102 mm (4.0 in) spread over 19 days, resulting in a relatively moderate humidity of 53%. In contrast, June features slightly warmer temperatures, with a minimum of 7°C (45°F) and a maximum of 22°C (71°F), averaging 14°C (58°F). However, it is considerably wetter, receiving 172 mm (6.8 in) of rainfall over 27 days and exhibiting much higher humidity at 93%. For a detailed look at June's weather, you can refer to Pasto weather in June.
When comparing the weather in September and July, we see notable differences in temperature and humidity levels. September typically enjoys a broader range of temperatures, with minimums around 6°C (43°F), an average of 15°C (58°F), and maximums reaching 23°C (74°F). In contrast, July has slightly lower average temperatures, with a minimum of 6°C (43°F), an average of 14°C (57°F), and a maximum of 22°C (72°F).
Precipitation is also a factor, with September experiencing 102 mm (4.0 inches) over 19 rainy days, while July sees a bit more rain at 112 mm (4.4 inches) across 22 days. Additionally, July features higher humidity levels at 84%, compared to September's more comfortable 53%. For more detailed information, you can check Pasto weather in July.
In comparing the weather between August and September, we can observe some notable differences. September generally experiences slightly warmer temperatures, with an average of 15°C (58°F) and a maximum of 23°C (74°F), compared to August's average of 14°C (58°F) and maximum of 22°C (72°F). Precipitation levels are higher in September, totaling 102 mm (4.0 in) over 19 days, while August received 85 mm (3.4 in) across 17 days. Additionally, September's humidity is lower at 53%, compared to August's higher level of 61%. For more details on August weather, you can visit Pasto weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 23°C (74°F), with an average of 15°C (58°F). The month sees about 102 mm (4.0 in) of precipitation over 19 days with a relatively mild humidity level of 53%. In contrast, October brings slightly warmer temperatures, with a minimum of 7°C (45°F), an average of 14°C (58°F), and a maximum of 24°C (75°F). However, it also brings significant rainfall, totaling 201 mm (7.9 in) over 26 days and increased humidity at 67%. For more detailed information, you can check Pasto weather in October.
In September, the weather features a minimum temperature of 6°C (43°F) and an average of 15°C (58°F), with maximums reaching 23°C (74°F). The month experiences about 102 mm (4.0 in) of precipitation over 19 days, accompanied by a relatively comfortable humidity level of 53%. In contrast, November sees a slight increase in minimum temperature to 8°C (46°F) but a decrease in the average temperature to 14°C (58°F), while still peaking at 23°C (74°F). However, November is notably wetter, receiving 266 mm (10.5 in) of rain over 27 days and experiencing higher humidity at 78%. For a deeper look at the weather specifics, check out Pasto weather in November.
September and December exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 23°C (74°F), with an average of 15°C (58°F). The month sees a substantial amount of rain, totaling 102 mm (4.0 in) spread over 19 days, accompanied by a moderate humidity level of 53%. Conversely, December experiences slightly milder temperatures, with a minimum of 7°C (45°F) and a maximum of 22°C (72°F), maintaining an average of 14°C (58°F). However, it is significantly wetter, with precipitation reaching 237 mm (9.3 in) across 27 days and a much higher humidity of 85%. For more detailed information, you can check out Pasto weather in December.
As September arrives in Pasto, it brings a distinct shift in weather patterns that sets it apart from the preceding months. While the overall temperature remains mild, with average readings around 15°C (58°F), the notable increase in precipitation—spanning 102 mm across 19 days—creates a uniquely wet atmosphere. This heightened humidity at 53% adds to the vibrant greenery that characterizes the region during this month, promoting a refreshing yet cooler climate experience. For those interested in a deeper dive into what makes Pasto's weather truly special, check out Pasto Climate.